Best Trailer Hitch Locks

Last Updated May 10, 2024

Picture this: you’ve just invested in a shiny new trailer, perfect for road trips and hauling gear. Now, imagine waking up one day to find that it’s vanished—stolen right from under your nose. Sounds like a nightmare, right? That’s exactly what happened to me last year, and it was a wake-up call to never leave my trailer unprotected again.

That’s why I swear by using a top-notch trailer hitch lock. It’s a simple step that makes a huge difference in keeping your trailer safe from thieves, who unfortunately, are always lurking around. If you haven’t secured your trailer yet, now is the time to do it—don’t invite trouble!

Wondering which hitch lock to get? Don’t worry, I’ve got you covered. In this guide, I’ll walk you through selecting the best trailer hitch lock, ensuring your trailer stays where you left it. We’ll explore everything you need to consider to make an informed choice, so stick around!

Best Trailer Hitch Locks

What is a Trailer Hitch Lock?

Have you ever thought about how simple it is to hitch up your trailer and head out for a weekend adventure? Now, imagine if someone else had the same thought—but they decided to take your trailer on their adventure without your permission. That’s exactly why I started using a trailer hitch lock, and believe me, it’s been a game-changer.

A trailer hitch lock is essentially a superhero for your trailer. It clamps down, making it tough for any opportunistic thief to just hitch up and drive off with your beloved RV. Not only does it act as a strong visual deterrent, but it also secures your expensive trailer and the valuable items inside. Think about it: trailers and their contents can rack up to thousands of dollars—can you really afford to take that risk?

Installing a trailer hitch lock is a breeze and doesn’t cost much, especially when you consider the peace of mind and protection it offers. I remember the first trip I took after installing mine, feeling so much more relaxed knowing that my trailer was secure during every stopover, no matter the neighborhood.

Don’t wait until it’s too late. Securing your trailer is a small step that protects a huge investment. Trust me, it’s worth every penny!

Best Trailer Hitch Locks

I’ve scoured the market and tested quite a few options to bring you the best trailer hitch locks out there. Whether you need a receiver lock or a coupler lock, I’ve got you covered. After a close call last summer when a nearby camper had their trailer snatched overnight, I decided to dive deep into the world of hitch locks. From my experience and rigorous testing, I’ve compiled reviews and recommendations to help you secure your trailer effectively. Stay tuned for top picks that will keep your trailer safe and sound!

Master Lock Receiver Lock

Master Lock Receiver Lock

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As someone who regularly tows trailers, I know the importance of securing them properly, and the Master Lock Receiver Lock has been a reliable tool in my arsenal. The model I’ve been using, the Master Lock No. 2866DAT Swivel Head™ Receiver Lock, is particularly noteworthy for a few reasons.

Firstly, the installation process is a breeze. The lock features a “Push to Lock” mechanism, which allows you to simply push the lock body onto the pin and remove the key, securing the lock without needing any additional adjustments. This feature is quite handy when you’re trying to hitch up in less than favorable weather conditions or when you’re in a hurry.

The lock is designed to fit both 1/2in and 5/8in receivers, making it versatile enough for most towing setups. I’ve used it on my Class III hitch without any issues. The usable length of the receiver pin is 2-3/4 inches, which fits perfectly for most standard hitches. The Weather Tough® seal and water-tight cap are great additions, protecting the lock from moisture and dirt, which is essential for maintaining its integrity and preventing corrosion over time.

Another point worth mentioning is the lock’s resistance to picking, thanks to its 4-pin cylinder. It offers an added layer of security that gives me peace of mind, knowing that it’s not just protecting against casual theft attempts but also more determined thieves.

The Master Lock Receiver Lock also comes with a Limited Lifetime Warranty, which speaks volumes about the manufacturer’s confidence in their product. It’s reassuring to know that you’re covered in the unlikely event of a defect.

While this lock does the job exceedingly well in securing the trailer, one minor inconvenience is the rubber cap that covers the keyhole. It tends to come off easily, which could be a concern if you’re not mindful of it. This hasn’t been a major issue for me, but it’s something to keep an eye on.


  • Easy Installation: The “Push to Lock” mechanism is incredibly user-friendly, allowing for quick and secure locking without the need for additional tools or complicated steps.
  • Versatility: Fits both 1/2 inch and 5/8 inch receiver sizes, making it suitable for a wide range of trailers and vehicles.
  • Weather Resistance: Equipped with a Weather Tough® seal and water-tight cap, the lock is designed to resist moisture, dirt, and rust, enhancing its durability and lifespan.
  • High Security: Features a 4-pin cylinder that provides added resistance against picking, offering a higher level of security compared to standard locks.
  • Lifetime Warranty: Comes with a Limited Lifetime Warranty, which assures quality and reliability from a well-established brand.


  • Keyhole Cover: The rubber cap that covers the keyhole can come off easily, which might expose the lock to elements or potential tampering.
  • Potential for Corrosion: Despite its weather-resistant features, there are reports of the lock rusting if left on the hitch for prolonged periods, especially in harsh weather conditions.
  • Visual Deterrent: The lock’s design is fairly standard and may not stand out as a visual theft deterrent compared to more brightly colored or uniquely designed locks.

Overall, the Master Lock No. 2866DAT has been an excellent choice for my trailer security needs. It’s reliable, easy to use, and built to withstand the elements, making it a top pick for anyone in the market for a hitch lock. Whether you’re storing your trailer or towing it across the country, this lock ensures your trailer stays where you left it.

Master Lock Universal Coupler Lock

Master Lock Universal Coupler Lock

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As someone who values the security of their trailer, I’ve had my share of experiences with various locks, and the Master Lock Universal Coupler Lock 389DAT stands out for several reasons. From my first use, I noticed the robust construction and bright red color, which not only looks good but serves as a visual deterrent against theft.

This lock fits universally across most trailer sizes—1-7/8″, 2″, and 2-5/16″ couplers—which makes it incredibly versatile and a great choice for anyone with different trailer types. Installation is a breeze; it slides on and locks in place without fuss, an aspect I greatly appreciate when I’m in a hurry to secure my trailer and hit the road.

The lock’s advanced locking mechanism is designed to resist picking and prying, offering an additional layer of security that gives me peace of mind. The heavy-duty construction not only prevents the coupler from being hitched by unauthorized users but also withstands various attempts to break or compromise the lock. Additionally, its resistance to rust and corrosion means it maintains its integrity even in outdoor and marine environments, perfect for those who, like me, often find themselves in varied climates.

With a price point that hovers around affordability, the Master Lock 389DAT offers good value, considering its durable construction and security features. Its universal fit and ease of use are significant advantages for anyone looking to enhance their trailer’s security without constant adjustments or compatibility concerns.


  • Universal Fit: Compatible with most trailer couplers including 1-7/8″, 2″, and 2-5/16″ sizes, making it highly versatile for different trailer types.
  • High Visibility: The bright red color increases its visibility, which serves as a strong deterrent against potential theft.
  • Durable Construction: Built to resist tampering, picking, and prying, enhancing the security of the trailer.
  • Corrosion Resistance: Suitable for outdoor use, including marine environments, as it resists rust and corrosion.
  • Ease of Use: Simple to install and remove, which is great for those who need to secure their trailer quickly and efficiently.


  • Price: While it offers good value, it is priced slightly higher than some other locks on the market, which might be a consideration for budget-conscious users.
  • Weight: Due to its heavy-duty construction, it is relatively heavier than some other locks, which might be cumbersome for some users to handle regularly.
  • Key Management: It comes keyed differently which means managing multiple keys if you purchase several locks; this could be inconvenient for those who prefer keyed alike options.

For those exploring trailer security options, the Master Lock 389DAT is a solid choice that balances functionality, ease of use, and cost. This lock not only secures your trailer but does so with an assurance of quality and reliability backed by a brand known for its robust security solutions​.

Fastway Fortress 86-00-5015 Coupler Lock

Fastway Fortress Coupler Lock

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As someone who values the security of their trailer, I recently decided to try out the Fastway Fortress 86-00-5015 Maximum Security Universal Coupler Lock. I must say, the experience has been nothing short of reassuring. This lock isn’t just any ordinary trailer accessory; it’s a fortress in its own right.

First off, the installation process was a breeze. The lock fits universally across most couplers, which was a huge relief as I’ve struggled with compatibility issues in the past. It accommodates 1-7/8″, 2″, and 2-5/16″ couplers, making it incredibly versatile for different trailer types, from boats and RVs to ATVs and horse trailers.

The build quality is something you can feel right from the first touch. Made from high-grade, corrosion-resistant materials, the Fastway Fortress feels robust and durable. The lock features a unique hardened steel “U” shaped shackle that’s reversible, adding an extra layer of security against potential theft. It’s designed to withstand attempts at picking, drilling, or any other form of tampering.

One of the standout features for me has been the ease of access to the locking mechanism. The keyhole faces front, which means no fumbling around awkwardly to secure or release the lock. This design detail may seem small, but it significantly enhances the user experience, especially on chilly mornings when I’m in a hurry to hitch up and get going.

Moreover, the dual locking pins ensure that once this lock is on, it stays on. The reassurance that comes with knowing your trailer is securely locked down cannot be overstated. Whether I’m stopping overnight on a cross-country trip or just storing the trailer at a local marina, I’ve noticed a significant drop in my worry levels.

From a personal perspective, the investment in the Fastway Fortress is well worth the peace of mind it offers. It’s not just about preventing the inconvenience of theft; it’s about protecting the lifestyle that my trailer enables. Whether it’s for leisure or work, knowing my trailer is secure lets me focus on the more enjoyable parts of my adventures.


  • Universal Fit: It’s compatible with nearly all coupler sizes (1-7/8″, 2″, and 2-5/16″), making it a versatile choice for various trailers​.
  • High-Quality Materials: Constructed from corrosion-resistant materials with a hardened steel shackle, it’s built to last and resist harsh weather conditions​.
  • Enhanced Security Features: The lock includes dual locking pins and a design that is difficult to tamper with, providing high security against theft​.
  • Easy to Use: The front-facing keyhole design makes locking and unlocking straightforward, without the need to awkwardly reach around the coupler​​.
  • Robust Protection: The lock’s thick housing and protective cover shield it from dirt, debris, and water, enhancing durability and security.


  • Price: It is slightly more expensive compared to some other locks on the market, which might be a consideration for budget-conscious buyers.
  • Weight: Due to its robust construction, it is heavier than some other locks, which could be a minor inconvenience when installing or removing it​.
  • Key Sensitivity: While the lock mechanism is generally smooth, some users might find the key turns to require precision, which could be tricky in colder conditions or for those with limited dexterity​.

In summary, if you’re in the market for a trailer hitch lock that combines ease of use with formidable security, the Fastway Fortress 86-00-5015 should be at the top of your list. It’s a small price to pay for the security and peace of mind it brings, making it an essential buy for any trailer owner.

Reese Towpower 7088300 Heavy Duty Coupler Lock

Reese Towpower Heavy Duty Coupler Lock

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As someone who often worries about the security of my trailer, finding the Reese Towpower 7088300 Heavy Duty Coupler Lock was a game-changer. This robust lock features a ratchet design with six locking positions, making it adaptable to various coupler sizes—1-7/8 in, 2 in, and 2-5/16 in. Its high visibility due to the bright, silver color acts as a deterrent against theft, which provides an extra layer of security.

I’ve been using it for several months now, and it’s incredibly easy to use. The lock slides into place effortlessly and provides a snug, secure fit without any hassle. The construction feels solid and durable, capable of withstanding various weather conditions without rusting or showing signs of wear. It’s reassuring to have a lock that I can rely on to keep my trailer safe when it’s parked in less secure areas or during off-season storage.


  • Universal Fit: Adjustable to fit 1-7/8 in, 2 in, and 2-5/16 in couplers, making it versatile for different trailer types.
  • Durable Construction: Made with heavy-duty materials to resist tampering and weather conditions, ensuring long-term reliability.
  • High Visibility: The bright, reflective color increases the lock’s visibility, deterring potential theft.


  • Weight: It is relatively heavy, which might be cumbersome for some users during installation or removal.
  • Price: It is on the pricier side compared to some other locks, which might not fit all budgets.
  • Limited Compatibility: Despite its universal claim, it might not fit all coupler types perfectly, requiring adjustments or additional securing measures.

For anyone in the market for a reliable trailer hitch lock, the Reese Towpower 7088300 offers peace of mind with its heavy-duty construction and versatile fit. It’s an essential accessory for trailer owners looking to secure their valuable assets​​.

TRIMAX T-3BLACK Premium 5/8″ Key Receiver Lock


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I’ve had the chance to thoroughly test the TRIMAX T-3BLACK Premium 5/8″ Key Receiver Lock, and I’m pleased to share my experiences in this detailed review. Right out of the box, the rugged black epoxy powder coat finish catches the eye, promising durability and a sleek aesthetic that matches perfectly with any vehicle, especially if you’re like me and prefer a coordinated look. This lock is not just about looks though; it’s built to last and withstand tough conditions.

Installation was a breeze. The lock fits all Class III and IV receiver hitches, which covers most common trailer sizes. This versatility is a huge plus for someone who might use multiple trailers. The keyed locking mechanism feels secure and operates smoothly, a critical feature to ensure ease of use during frequent hitching and unhitching.

In terms of security, the solid construction offers peace of mind. I’ve parked in various environments, from urban to rural, and the lock has held up impressively against potential tampering. It’s comforting to know that the lock is designed to be resistant to leverage and cutting attacks, which are common methods employed by thieves.

Another aspect worth mentioning is the lock’s resistance to weather. I’ve used it through different seasons, and the epoxy coating has proven its worth by preventing rust and corrosion, maintaining both functionality and appearance.


  • Durable Construction: Made with a rugged black epoxy powder coat, the lock is built to resist wear, tear, and corrosion, making it suitable for use in various weather conditions.
  • Universal Fit: Designed to fit all Class III and IV receiver hitches, which makes it versatile for different trailer types without the need for additional adapters.
  • Enhanced Security: Features a robust locking mechanism that provides resistance against tampering, leverage, and cutting attacks, ensuring your trailer remains secure.
  • Aesthetic Appeal: The sleek black finish not only adds to the durability but also enhances the visual appeal, making it a good match for any vehicle, especially those with a similar color scheme.
  • Ease of Use: Simple to install and operate, which is great for frequent use without fumbling with complicated mechanisms.


  • Limited Compatibility: While it fits most Class III and IV hitches, owners of smaller or non-standard hitches may find it incompatible.
  • Single Key Mechanism: Comes with only two keys and lacks the convenience of a keyless or combination lock option, which could be a drawback if keys are lost.
  • Weight: Slightly heavier compared to some other locks, which could be a minor inconvenience during installation or removal.

In summary, the TRIMAX T-3BLACK is a reliable choice for securing your trailer. It combines durability, ease of use, and effective security features into one compact device. Whether you’re an occasional camper or a frequent hauler, this lock could be a great addition to your gear, ensuring that your trailer stays where you left it.

For anyone in the market for a reliable trailer hitch lock, the TRIMAX T-3BLACK should definitely be on your list of considerations. It’s not just a lock; it’s an investment in security and peace of mind.

AMPLOCK U-BRP2516 RV/Trailer Coupler Lock

AMPLOCK Trailer Coupler Lock

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When it comes to securing my trailer, I’ve always prioritized durability and security, and the AMPLOCK U-BRP2516 has been a game-changer for me. After considerable research and past experiences with less robust options, I decided to invest in this lock, and it has not disappointed.

From the get-go, the AMPLOCK U-BRP2516 impressed me with its hefty feel and solid construction. Made from stainless steel and ducted cast iron, it’s designed to withstand significant impacts and prevent various types of unauthorized hitching attempts. This lock fits perfectly on 2-5/16″ ball couplers with a flat lip, which was exactly what I needed for my RV.

One of the standout features is its patented lock mechanism, complete with a unique swivel design that makes it particularly tough for thieves to tamper with. The lock’s design not only deters drilling but also includes a cylinder lock that’s strategically positioned to be hard to access. I’ve found the push and lock system to be incredibly user-friendly, a huge plus when I’m in a hurry to secure my trailer and head out.

Weighing in at 11.9 pounds, it’s not the lightest lock on the market, but the extra weight contributes to its resistance against cutting and theft. It’s also treated with e-coat and electrostatic paint to enhance its rust resistance, ensuring that it holds up well in all weather conditions, which has been perfect for my frequent trips to various climates.


  • Superior Build Quality: Constructed from stainless steel and ducted cast iron, the AMPLOCK U-BRP2516 is built to resist severe impacts and attempts at theft. This makes it extremely durable and reliable for long-term use.
  • Advanced Security Features: The lock features a patented locking mechanism and a unique swivel design which makes it difficult for thieves to tamper with. The positioning of the cylinder lock also adds an extra layer of security as it’s hard to access.
  • User-Friendly: The push and lock system is straightforward and easy to use, which is great for those who don’t want to fumble with complicated locking mechanisms.
  • Weather Resistance: With its e-coat and electrostatic paint treatments, the lock offers improved rust resistance, making it suitable for various environmental conditions.


  • Weight: Weighing at approximately 11.9 pounds, the lock is on the heavier side, which might not be ideal for those who prefer a more lightweight option.
  • Price: The AMPLOCK U-BRP2516 is quite pricey compared to other trailer locks on the market, which could be a deterrent for some buyers.
  • Compatibility: It is specifically designed to fit 2-5/16″ couplers with a flat lip, so it won’t be compatible with all trailer types, potentially limiting its usability for some users.

Overall, the AMPLOCK U-BRP2516 offers peace of mind with its top-tier security features and robust construction, making it an essential investment for anyone serious about protecting their trailer. It’s not just a lock; it’s an investment in security and durability for my RV adventures. Highly recommended for those who want to safeguard their trailers from theft with a product that withstands the test of time and elements.

Rhino USA Trailer Hitch Lock

Rhino USA Trailer Hitch Lock

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As someone who takes the security of their trailer seriously, I’ve found the Rhino USA Trailer Hitch Lock to be an excellent choice. This robust hitch pin lock is designed with a â…ť” locking receiver pin that fits perfectly with Class III and IV hitches. Having used this lock across various trips, I can confidently say that it lives up to its promise of top-notch security and durability.

One of the standout features of this lock is its solid forged steel construction. This not only ensures that your trailer stays securely hitched, but it also stands up well against any attempts to tamper with it. The weatherproof slide cap is a thoughtful addition, protecting the lock mechanism from dust, gunk, and mud, which is particularly useful in extreme conditions. Whether I’m towing my boat or carrying loads on rough backroads, this lock has never failed to provide peace of mind.

The lock is incredibly user-friendly too. It comes with two keys and features a straightforward locking mechanism that is easy to operate. Even if you’re new to using trailer hitch locks, the installation and removal process is simple and hassle-free. This ease of use does not come at the expense of security, however; once locked, the Rhino USA Hitch Lock feels as solid as a fortress.

The durability of this lock is another significant plus. It’s built to withstand the elements, thanks to its high-grade materials and corrosion-resistant finish. This means you won’t have to worry about replacing your hitch lock anytime soon, making it a great investment for anyone who regularly tows trailers or other equipment.


  • High Security: The lock is made from solid forged steel, which provides excellent strength and resilience against theft and tampering. The robust locking mechanism ensures that the trailer remains securely attached to the towing vehicle​.
  • Durability: Built to last, the lock features high-grade materials and a corrosion-resistant finish. This makes it suitable for use in various weather conditions and environments, ensuring long-term performance without deterioration​​.
  • Ease of Use: The design of the lock is user-friendly, allowing for quick installation and removal. The included keys and simple locking mechanism make it accessible even for those who are not mechanically inclined​.
  • Universal Fit: Designed to fit most standard hitch receivers, this lock can be used with a wide variety of trailers, including boats, RVs, and utility trailers. This versatility makes it a practical choice for most towing needs​.
  • Weatherproof Protection: The weatherproof slide cap protects the locking mechanism from external elements like dust, mud, and moisture, which is particularly beneficial for off-road or harsh weather conditions​.


  • Limited Receiver Sizes: While it fits most standard hitches, users with non-standard hitches might find the lock incompatible. It’s important to check the specifications for receiver sizes before purchase​​.
  • Key Dependency: The lock depends on physical keys for operation, which could be a drawback if the keys are lost or misplaced. Users need to keep track of the keys to avoid being locked out from their own trailers​.
  • Price Point: Compared to some other locks on the market, the Rhino USA Trailer Hitch Lock might be considered a bit pricey. However, the cost is justified by its superior quality and features​​.

Overall, the Rhino USA Trailer Hitch Lock is an exceptional product that offers both supreme security and ease of use. It fits most standard hitch receivers, making it a versatile choice for various types of trailers and towing tasks. If you’re looking for a reliable way to secure your trailer, this lock should definitely be at the top of your list.

CURT 23518 Black Trailer Hitch Lock

CURT Black Trailer Hitch Lock

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As an avid camper and someone who frequently tows a trailer, finding a reliable hitch lock was essential to my peace of mind on the road. I’ve been using the CURT 23518 Black Trailer Hitch Lock for a couple of months now, and I must say, it’s a game-changer for securing my trailer.

Firstly, the barbell design of the CURT hitch lock is straightforward yet highly effective. It fits perfectly into my 2-inch receiver with a 5/8-inch pin diameter, ensuring a snug fit that’s crucial for security. One of my favorite features is the watertight dust cap which protects the lock mechanism from corrosion—a common issue I’ve encountered with other locks in the past. This design detail not only extends the life of the lock but also maintains its smooth functionality over time.

Operating the lock is a breeze with its simple quarter-turn lock activation. This ease of use is something I really appreciate, especially when I’m in a hurry to get on the road or secure my trailer after a long day. The inclusion of two keys is quite handy, allowing me to have a spare just in case.

I was initially skeptical about the security level of the CURT hitch lock, given its relatively simple design. However, after several months of use and exposing it to various weather conditions and potential tampering scenarios, I’m convinced of its reliability. The sturdy build and precise fit give me confidence that my trailer is safe while parked, even in less secure areas.

In terms of improvements, while the CURT hitch lock does a fantastic job for standard 2-inch receivers, those with a different receiver size might need to look at other options, as compatibility can be an issue. Additionally, while the lock is robust, an upgrade to even higher-grade material could be beneficial for those in harsher environments.


  • Watertight Dust Cap: The CURT 23518 comes with a watertight dust cap that covers the key insert. This feature prevents moisture and dirt from entering the lock mechanism, thereby reducing the risk of corrosion and ensuring the lock remains functional over time​​.
  • Easy Operation: The lock features a quarter-turn lock activation, which is user-friendly and efficient. This makes it quick and easy to secure and remove, saving time and reducing hassle when hitching or unhitching your trailer​​.
  • Durable Construction: Built with sturdy materials, the CURT 23518 is designed to withstand attempts at tampering and adverse weather conditions, offering a dependable solution to trailer security​.
  • Universal Fit for 2″ Receivers: The lock is designed to fit any standard 2″ receiver, making it versatile for a variety of trailers and towing setups​.
  • Includes Two Keys: It comes with two keys, which is convenient for users who like to have a backup or need to share access with another person​.


  • Limited Receiver Compatibility: While it is perfect for 2″ receivers, this lock is not suitable for other sizes without an adapter, which could be a limitation for users with non-standard receiver sizes​​.
  • Basic Security Level: Although it offers solid protection, it may not provide the highest level of security against determined thieves equipped with specific tools. For those in high-theft areas, an additional security measure might be necessary​​.
  • Material Quality: While the construction is generally robust, users in extremely harsh environments or frequent use might find the material susceptible to wear over time. An upgrade in material could enhance its longevity and performance​.

Overall, I highly recommend the CURT 23518 Hitch Lock for anyone looking for an effective, reliable, and easy-to-use solution to secure their trailer. Its solid construction, ease of use, and effective security measures make it a top contender in the trailer hitch lock market.

Trimax UMAX100 Premium Universal Dual Purpose Coupler Lock

Trimax Premium Universal Dual Purpose Coupler Lock

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Having had my fair share of concerns over trailer security in the past, the Trimax UMAX100 Premium Universal Dual Purpose Coupler Lock has been a game-changer for me. This lock’s universal fit caters to most coupler sizes, ranging from 1-7/8″ to 2-5/16″, which means it seamlessly fits on various trailers, including those for boats, campers, and utility trailers.

One of the standout features of the UMAX100 is its robust construction. The lock is crafted from hardened steel, providing a substantial feel and ensuring that it can withstand attempts to break or cut it. Additionally, the dual ratchet lock system is impressively secure, employing a six-tooth, 3/8″ wide locking lug system that adds an extra layer of theft prevention. It’s not just about the brawn; this lock also features a ballistic grade nylon housing that absorbs impact from hammer blows and shields against severe weather conditions—a real benefit for keeping the lock functional through varied environmental challenges.

The installation and usability of this lock are straightforward, making it a hassle-free addition to my trailer security measures. Its easy-on and easy-off functionality is something I appreciate, especially when I’m in a hurry. The peace of mind this lock brings when I leave my trailer unattended is invaluable. I’ve also found the included keyhole cover to be a thoughtful touch, keeping out dirt and grime and preserving the locking mechanism’s integrity over time.


  • Universal Fit: Adapts to a wide range of coupler sizes (from 1-7/8″ to 2-5/16″), making it versatile for various types of trailers.
  • Robust Construction: Made of hardened steel, it ensures durability and resistance against attempts to cut or break the lock.
  • Enhanced Security Features: Features a dual ratchet lock system with a six-tooth, 3/8″ wide locking lug, providing significant theft prevention.
  • Weather Resistance: The ballistic grade nylon housing protects the lock against harsh weather conditions and physical impacts.
  • Ease of Use: Simple to install and remove, which is convenient for frequent users.
  • Keyhole Cover Included: Protects the lock mechanism from dirt and debris, prolonging its life and functionality.


  • Weight: Due to its sturdy construction, the lock is relatively heavy, which might be cumbersome for some users.
  • Price Point: It’s on the pricier side compared to some other locks on the market, which might be a consideration for budget-conscious consumers.
  • Limited Color Options: Comes primarily in one color, which may not appeal to those looking for customization options.

For anyone in the market for a reliable trailer hitch lock, the Trimax UMAX100 offers a blend of universal compatibility, robust protection, and ease of use that makes it a top contender in its category. Whether you’re looking to secure a boat, camper, or utility trailer, this lock promises peace of mind with its comprehensive security features​.

Buyer’s Guide to Buying the Best Trailer Hitch Lock

Choosing the perfect trailer hitch lock for your RV might seem daunting with all the options out there. Let me break it down and make it simple with my guide to the essential features you should consider.


When I first started looking into trailer hitch locks, setting a budget felt like guesswork. You’ll find decent options from $15-$30 that ward off casual thieves—perfect if you’re watching your pennies but still value security.

For those storing their trailers in less secure locations or leaving them unattended for long periods, consider investing more—sometimes up to several hundred dollars. This could protect not just your trailer but also the valuable cargo inside. I’ve learned it’s worth spending a bit more for peace of mind, especially if you can’t afford to lose what’s inside your trailer.

Hitch Class/Coupler Size

First things first, know your hitch class and coupler size to ensure the lock fits perfectly. I remember the hassle I saved by double-checking these details before purchasing. Most receiver locks fit ½ inch or ⅝ inch pins, with various classes accommodating different sizes. Always double-check or ask the manufacturer if unsure!

Material and Durability

Go for hardened steel if you want durability and robust protection. Steel outperforms aluminum or plastic, hands down, especially if you’re looking for something that withstands any attempt at tampering.

Ease of Use

Since I’m often hitching and unhitching my trailer, ease of use is crucial. I prefer locks that snap shut without needing a key every time. And if you can get a lock set where everything works on the same key, even better!

Visibility and Unique Keys

A brightly colored lock isn’t just about style—it’s a significant deterrent. Also, opting for a lock with unique keys enhances security, ensuring that only your set of keys will open your lock.

Remember, while a lock won’t make your trailer theft-proof against a determined thief, it sure can discourage those looking for an easy steal. Making your lock visible and hard to tamper with goes a long way. Trust me, taking these small steps can save you a lot of trouble and expense in the long run!

Types of Trailer Hitch Locks

Navigating the world of trailer hitch locks can be a bit overwhelming, but let me simplify it for you. You’ll generally need two types: one for when you’re towing and another for when your trailer is parked and unhitched.

Receiver Style Hitch Locks

When your trailer is hitched to your vehicle, that’s where receiver hitch locks come into play. They replace the standard hitch pin, locking it securely. I remember this one time I was able to grab lunch and shop without fretting over my trailer’s safety—all thanks to my trusty receiver lock. It’s also perfect for securing hitch-mounted accessories like bike racks.

There are three main types of receiver hitch locks:

  • Right Angle Hitch Locks: These are super convenient with front-accessible locks. Ideal if you need quick and easy access.
  • Barbell Hitch Locks: The classic design that mimics a traditional hitch pin with secure end caps. Simple and effective.
  • Deadbolt Hitch Locks: Resembling a robust hitch pin, these feature a heavy-duty lock at the end, providing both security and a visual deterrent.

Coupler Hitch Locks

For those times when your trailer is unhitched, a coupler hitch lock is essential. It prevents anyone from just hooking up to your trailer and driving away.

These locks typically have a U-shaped shackle that clamps over the coupler. A ball-shaped piece then locks into place where the hitch ball would normally go. When I first got mine, it gave me immense peace of mind, knowing that even when I’m not around, my trailer isn’t going anywhere.

Remember, whether you’re on the road or parked, securing your trailer correctly is crucial. These locks have saved me more than just a few headaches—they’ve prevented potential thefts too!

Final Thoughts

Choosing the right trailer hitch lock for your RV is no small task, but it’s a crucial step in protecting your beloved travel companion. Take a moment to think about your needs, but remember, the sooner you secure your trailer, the better.

From my own journey, I learned the hard way that not all hitch locks are created equal. For those times when you’re on the move, I highly recommend the Curt Black Trailer Hitch Lock. It’s super easy to use and comes with a watertight dust cap that keeps out road salt and moisture, perfect for nearly all two-inch receiver tubes. It’s affordable and really gives you that peace of mind when you’re grabbing a bite or stocking up on supplies.

Now, when it comes to keeping your trailer safe while it sits unattended, the Fastway Fortress stands out for its value and robust security. With features like a universal fit, anti-drill pin, and a bolt-blocked locking system, it’s a no-brainer for budget-conscious travelers. Its tough-as-nails steel build makes it a top pick in my book.

And if your trailer is on the pricier side, consider splurging on the Amplock Trailer Coupler Lock for that extra layer of security. Made in Canada with US materials, this lock combines stainless steel and cast iron to offer top-notch protection that’s also user-friendly.

Remember, investing in a good hitch lock is cheaper than replacing a stolen trailer. As they say, better safe than sorry!

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