Best Trailer Hitch Locks: Reviewed For All Cars, Boats & RVs

You made sure you got the best hitching system you could make sure your cargo is safe while in transit, but what about when you need to stop or break for the night on a long haul? Trailer hitch locks make sure your cargo stays safe while stationary and gives you peace of mind on and off the road. If you are looking for the best quality trailer hitch lock, no matter what the situation, keep reading and we will tell you everything you need to know about these locks designed to make disconnecting cargo and vehicle no simple matter.


Preview

Model

Hitch Lock Design

Coupler Size

Check Price

Proven Industries Lock Model #2516 |...

Proven Industries 2516

Coupler Lock

2 5/16”

AMPLOCK U-TLS2 : 2'' Boat Trailer...

AMPLock U-TLS2

Cylinder Lock (Receiver)

2”

Heavy Duty Conical Trailer King Pin Lock

WAR-LOK

Pin Lock

N/A

Blaylock TL-22 Total Encasement Bulldog...

Blaylock TL-33

Coupler

2-2 5/16”

TowWorks Keyed Alike 5/8' Trailer Hitch...

TowWorks 79632

Receiver Lock

2-2.5”

Tow Ready (63228) 'Gorilla Guard' Coupler...

Tow Ready 63228

Coupler Lock

2”

AMPLOCK U-BRP2516 RV/Trailer Coupler Lock...

AMPLock U-BRP2516

Coupler Lock

2 5/16”

No products found.

Trimax UMAX100

Coupler Lock

1 7/8”, 2” – 2 5/16”

Andersen Hitches Stainless Steel Lock Set for...

Andersen Hitches

Rapid 3492

Receiver Pin Lock

2” and 2.5”


Why Trailer Hitch Locks Are Worth Investing In

Trailer hitch locks at their core are designed to keep unauthorized access to the hitching mechanism between the vehicle and cargo. However, the other benefit to trailer hitch locks is not just in making theft difficult to impossible but also to serve as a visual deterrent. Just seeing a security measure attached to something lets anyone thinking of tampering or stealing that it is much more complicated than something without any security measures. This visual deterrent, coupled with the actual mechanism blocking any theft attempts, keeps your cargo safe and secure while you are away.


Types of Trailer Hitch Locks

Coupler Hitch Lock

A coupler hitch lock is designed to prevent your trailer from being able to be connected to another vehicle. These types of locks are ideal for anything that may need to sit on a trailer when the towing vehicle is disconnected like a car, truck, or boat. Generally, these locks are a U-shape that go over the coupler and often have a ball-shaped top to simulate the ball unit of a towing vehicle and secure with a key. With no access to the coupler, there is no way for another vehicle to connect to your trailer.

Receiver Style Lock

Receiver locks are meant to be used to lock your vehicle and trailer together by fitting crosswise into the receiver of the vehicle. The hole on the lock will allow you to slide a pin into place and lock the connection with a key that keeps the bar from being able to be removed unless the lock is unlocked. These locks are great for RVs or other trailers that you would leave attached to a towing vehicle while being away.


Features to Look for in a Trailer Hitch Lock

Fits Vehicle Hitch Receiver

The first thing you should do before buying a hitch lock is to be sure of the type of hitch and connection between vehicle and trailer. Pay attention not just to how the two connect but the size of the connecting pieces as well as the shape. Some locks may not work with different sizes, connections, and shapes, so a bit of preparation can save you a headache at the store.

Material

Depending on where and what kind of terrain your vehicle and trailer will be going through, you may need to consider different materials for your hitch lock. Hardened steel locks are made to resist the elements and take a beating without compromising their ability to secure your vehicle and trailer.

Lock Design/Unique Key

Any lock is only as good as the key that unlocks it because one without the other is not very useful. Pay close attention to the type of locking mechanism the lock uses, and if it is a key lock, make sure the key is good quality and will not run the risk of breaking or bending and is of a unique design that is not mass produced or easily counterfeited.

Hitch Class/Coupler Size

Just as important as the size and shape of your hitch and receiver is the class of your hitch. The class is what determines how much gross weight the trailer and its cargo can weigh and still be safely secured by the hitch.

Class

Class Name

Maximum Gross Trailer Weight (Pounds)

I

Light Duty

2,000

II

Medium Duty

3,500

III

Heavy Duty

5,000

IV

Heavy Duty

8,000

V

Heavy Duty

15,000

The University of Purdue has an excellent guide to trailer hitch usage and specifications here to help figure out your hitch class.

Security & Safety

Be sure to pay attention to additional security features on locks like GPS tracking, alarms, or even reflective materials as these can be nice additions to make sure your trailer is secure and easy to locate in case of an incident. For general towing safety, please feel free to read Auburn University’s guide to Towing Safety as it is important to make sure that from theft deterrent to being on the road, safety is a number one priority.

Ease of Use

When looking at a lock, make sure to find one that is as difficult to break into for a thief but easy enough for you to be able to access when needed. Things like convenient keyhole placement or the placement of the locking mechanism can make a lock a quick and easy routine whenever you travel.

Budget & Warranty

Like any product, trailer hitch locks come in many different varieties to fit most budgets, and with a bigger budget will come additional features. Warranty will vary between manufacturer and retailer, so be sure to find any documentation on warranty available before making a purchase.


9 Best Trailer Hitch Locks Reviewed

1. Proven Industries 2516

Our Top Pick!

Hitch Lock Design

Coupler Lock

Material

Aluminum

Hitch Class

N/A

Coupler Size

2 5/16

Weight

10 Lbs.

Warranty

Yes, lifetime

Topping our list as the best trailer hitch lock is a coupler lock from Proven Industries. They proclaim, “we pride ourselves on a glove like fit security product…” and when it comes to deterring thieves, the less room to work with, the better the lock.

The 2516 is so named because it is designed for couplers that are 2 5/16” fitting snuggly over top and locking at the bottom with extra holes to allow you to padlock safety chains or other items to the trailer for safekeeping. In order to keep their locks in top shape, Proven Industries has upgraded the 2516 model from its original lock to a 7-pin tubular lock to increase the complexity of the lock itself.

The entire hitch lock is made of aluminum to keep things light but durable and able to handle the weather and roads wherever and with whatever you are hauling. Included with the lock are two keys so you can have an extra stashed in case you misplace one or have someone else who may need access to the trailer in your absence. After securing both halves of the lock, simply turn the keys and enjoy peace of mind with the Proven Industries 2516.

Pros

  • Lightweight and durable
  • Comes with a spare key
  • Lifetime Warranty
  • Simple to install

Cons

  • Only fits 2 5/16” couplers

2. AMPLock U-TLS2

Best Boat Trailer Hitch Lock

Hitch Lock Design

Cylinder Lock (Receiver)

Material

Steel/Stainless Steel

Hitch Class

N/A

Coupler Size

2”

Weight

4.67 Lbs.

Warranty

5 years

AMPLock focuses on locks for boat trailers and RVs and that dedication to their craft is apparent in the simple yet durable design of their wide range of locks. For those who like to be on the water, the U-TLS2 is the perfect choice for making sure your boat trailer cannot be connected when not connected to your vehicle.

Made of steel and stainless steel, the entire lock is designed to resist corrosion but also hold up better than other materials to torch cutting or liquid nitrogen methods of lock breaking. The lock cylinders are also designed to have a rotative face, so drilling attempts will also fail. Due to the positioning of the lock, traditional picking methods are next to impossible.

Tough to crack, but easy to install, the U-TLS2 is designed to attach to 2" trailer couplers and deny access to parts of the coupler that thieves can use to gain access. Simply put the lock in place, push up the cylinder, and lock the device with the included key. Extra keys can be purchased through AMPLock in the event of loss, and each key is uniquely cut. Security and simplicity, the AMPLock U-TLS2 is the boater's best friend when beached.

Pros

  • easy to install
  • Unique keys for each customer
  • Resistant materials for elements and theft prevention

Cons

  • Not to be used when trailer is connected to a vehicle

3. WAR-LOK

Best Trailer Hitch Pin Lock

Hitch Lock Design

Pin Lock

Material

Cast steel

Hitch Class

N/A

Coupler Size

N/A

Weight

5.044 Lbs.

Warranty

Yes, one year

Unlike a coupler or receiver lock, a pin lock is designed to prevent another vehicle from attaching to the king pin on your trailer, and WAR-LOK's conical King Pin Lock will stop any would-be thief in their tracks. Simply slide the lock over your trailer's king pin and lock it with the provided key. If someone attempts to connect to the king pin while the lock is in place, they will instead be blocked from making any kind of connection by the heavy-duty cast steel lock.

When you need to take the lock off, it's just a quick key turn, and the lock comes off and is ready to be stored for the next use with its handle for carrying ease. There is some maintenance required with this lock as you will want to make sure that you are giving it a spray with Slick 50 One Lube every 90 days or when needed.

WAR-LOK advises against using WD-40 with this lock as it has been known to cause issues with the lock's design. Be sure to register your lock with WAR-LOK as you will need to have it registered and have the number found on the keys handy to be issued additional keys for your lock.

Pros

  • quick installation
  • Small and easy to store when not in use
  • Cast steel used for longer lifespan

Cons

  • Does require some maintenance

4. Blaylock TL-33

Easy To Use

Hitch Lock Design

Coupler

Material

Aluminum/Steel

Hitch Class

N/A

Coupler Size

2-2 5/16”

Weight

N/A

Warranty

No

Sometimes the best things come in the simplest package, and the best trailer hitch coupler lock is the Blaylock TL-33. Made of aircraft-grade aluminum so the metal will not rust, the TL-33 is a simple bar style coupler lock. It is designed to be paired with a padlock (not included) and fits a variety of rigger style couplers on some of the most popular trailer brands (Fulton, Shelby, Dutton-Lainson, Atwood). The bar is made of ¾ in thick steel to deter cutting or freezing attempts.

These locks are budget friendly and are commonly found under $50 USD and sold in packs for volume discounts. Even for those just looking to rent a trailer for moving will want to consider the TL-33 if they must leave the trailer unattended for any extended period of time as these also fit with most U-Haul trailer sizes.

Installation is quick and easy and comes with three different hole configurations to ensure the best fit with a variety of receiver styles and sizes. As mentioned earlier, a padlock is required to complete this system, so take the savings from the lock itself and get yourself a heavy-duty padlock to match.

Pros

  • Easy to install
  • Heavy-duty locking bar
  • Fits many different brands

Cons

  • Requires padlock

5. TowWorks 79632

Best Trailer Hitch Receiver Lock

Hitch Lock Design

Receiver Lock

Material

Steel/Rubber

Hitch Class

III-V

Coupler Size

2-2.5”

Weight

2.45 Lbs.

Warranty

N/A

TowWorks not only had safety and security in mind when designing the 79632 model but also threw in anti-rattle measures to keep your connection quiet. The anti-rattle technology not only makes sure the ride is quiet but also helps prevent the lock from coming loose due to shaking going over rough terrain or in bad weather. The keyholes are also covered by rubber caps to make sure to prevent internal corrosion of the locking mechanism due to rain, dust, or whatever weather comes your way.

These locks are also designed to handle weights of up to 20,000 lbs when towing, assuming your vehicle is up to the task. Hardened steel offers the strength to haul such heavy loads but also to keep it durable since it was cast in one piece and is less likely than others to come apart.

The bar goes through your receiver to make sure that there is no separation of vehicle and trailer unless the bar breaks or the key is used. Given how strong the bar is, it is probably best to remember your key, but in case you forget, a second key is included. These are designed for 2"x2" or 2.5"x2.5" receivers, so be sure to measure before purchasing.

Pros

  • High-quality material
  • One piece of steel
  • Spare key

Cons

  • Does not fit some mounts so best to check fit before purchase

6. Tow Ready 63228

Best Heavy-Duty Trailer Hitch Lock

Hitch Lock Design

Coupler Lock

Material

N/A

Hitch Class

N/A

Coupler Size

2”

Weight

2.1 Lbs.

Warranty

Yes, lifetime

The Tow Ready 63228, affectionately titled the "Gorilla Guard," comes in swinging to make sure that your trailer cannot be connected to anything you do not want it connected to. The design fits over the coupler and shields the coupler from any device that might try to tamper with it once the lock is secured. It is important to note that this lock is designed for 2" couplers with widths (including the lip) not exceeding 3-13/16" and the coupler lip height not exceeding 5/16”. Be sure to bust out the tape measurer first.

The keys and lock itself are designed to be compact and easy to stow and go. Simply unlock the lock, throw it in the glove box and take your equipment, horse trailer, or whatever you need to haul to its location.

After you detach your vehicle, just grab the lock, put it back on the coupler, and your trailer is fit to stay better than even the best-trained pooch. This lock is designed to withstand impact, and with the main locking mechanism located in the center of the lock, it makes it difficult for anything to get near it aside from the keys used to lock and unlock.

Pros

  • Compact and easy to stow and go
  • Impact-resistant
  • Blocks tampering devices

Cons

  • Has fairly exact measurements for use

7. AMPLock U-BRP2516

Best RV Trailer Hitch Lock

Hitch Lock Design

Coupler Lock

Material

Steel

Hitch Class

N/A

Coupler Size

2 5/16”

Weight

12 Lbs.

Warranty

Yes, 5 years

From the folks that brought you the best boat trailer hitch lock, it should be no surprise that they also made the best RV trailer hitch lock, the AMPLock U-BRP2516. Similar to the U-TLS2, the U-BRP2516 is designed to be used when your RV or caravan is not connected to your vehicle, and this lock fits right in place to keep another vehicle from connecting to it.

Since this is designed for RV use, the materials chosen were picked to be rust-resistant and live up to the muddiest of trails. AMPLock’s push and lock feature means that you will not be wasting time fiddling with the lock when installing or removing and can get the most out of your time out in the wild.

Just like before, keys are uniquely cut and can be repurchased if needed from AMPLock beyond the included key. You can be sure that no other AMPLock U-BRP2516 has the same key and that the unique identification makes it possible to locate an individual lock if registered. Whether you are headed for the water or the woods, be sure to pick up your AMPLock for the boat or RV and sleep easy in safety and security.

Pros

  • Easy to install
  • Unique keys
  • Rust resistant

Cons

  • Pricier than other locks

8. Trimax UMAX100

No products found.

Best Universal Trailer Coupler Lock

Hitch Lock Design

Coupler Lock

Material

Solid Hardened Steel

Hitch Class

N/A

Coupler Size

1 7/8”, 2” – 2 5/16”

Weight

N/A

Warranty

Yes, lifetime

When you put "Universal" in your name, you better deliver, and the Trimax UMAX100 certainly does with one of the largest ranges of coupler sizes than any other coupler lock on the market. The entire lock offers a stainless-steel construction to hold up to the elements, tampering and anything else that comes at it.

Like other coupler locks, the UMAX100 is designed to be used when your trailer is disconnected from your vehicle and serves to take the place of the hitch. Unlike other coupler locks, the UMAX100 has two ratchet lock systems to secure on either side of the coupler.

Not only is this hard to break into, but the sight of this lock is a deterrent by itself, and with the stainless-steel finish of the locking bar, it is sure to catch the eye and keep away a would-be thief. The UMAX100 is quick to take off and install.

Simply unlock the main body and lower the device down the ratchet arms, then slide it back up into position around your coupler and lock once it is in place. With a fit for many different sizes, the UMAX100 is an excellent choice for those with several trailers that they need to switch between.

Pros

  • Fits many different sizes
  • Quick and easy install
  • Visual deterrent

Cons

  • Not as much information available about the device

9. Andersen Hitches Rapid 3492

Best Trailer Hitch Locking Pin

Hitch Lock Design

Receiver Pin Lock

Material

Stainless Steel/Aluminum

Hitch Class

N/A

Coupler Size

2” and 2.5”

Weight

1.65 Lbs.

Warranty

Yes, one year

Rounding out our list of the best trailer hitch locks is the Andersen Hitches Rapid Hitch 3492, our pick for the best trailer hitch locking pin. Keeping it simple, the 3492 locks your receiver when it is connected to make sure that no one can remove the trailer from the vehicle towing it. Deceptively easy, the bar slides into the receiver and is then locked using one of the two included keys via the covered keyhole that protects the interior of the lock from corrosion.

If you have a Rapid Hitch, the included adjuster pin will fit all Rapid Hitch models. For those not using a Rapid Hitch model, the standard receiver pin fits all standard 2” and 2.5” receivers. This is another great option for those with horse trailers that stay connected to a vehicle and require a bit more strength to tow.

The 3492 is rated for 30,000 lbs and is up to any task your vehicle is. The stainless-steel bars, paired with aluminum heads, keep the locks from rusting and makes them highly resistant to other environmental factors for years to come. Whether you are using a Rapid Hitch model or not, the 3492 is a great choice for your receiver lock needs.

Pros

  • Easy to use
  • Rust-resistant materials
  • Rated for nearly 30,000 pounds

Cons

  • Caps for the keyholes are plastic and may not hold up as long as the lock itself

Choosing the Right Size Hitch Lock

When selecting a receiver style hitch lock, you need to make sure that you measure the overall width of the outside of the receiver at the hitch pin hole. Class I and II receivers are generally 1 1/4” while III or larger are 2-2.5” depending on the receiver. Coupler hitch lock sizes are determined by the size of the ball that the lock will couple to. Measure the diameter of the ball and match that to the coupler lock of the same size.


Locking & Unlocking a Trailer Hitch

The locks we covered in this article all use keys for secure locking and unlocking purposes. This makes it quick and easy for the one who has the keys and difficult for anyone without them. Receiver locks will have the lock usually on an end of the bar, while coupler locks can vary on location but are generally on the bottom of the lock, so the keyhole is hidden from plain sight but easy to access when you need to lock and unlock.


Tips to Prevent Trailer Theft

The best way to prevent trailer theft is to make sure you keep the trailer stored somewhere that is difficult to access like a garage or behind the vehicle that towed it. Trailer hitch locks that have a high profile (like the UMAX100) are great visual deterrents that allow would-be thieves to see from a distance that their efforts are futile. Make sure to keep the keys for the locks on your person or in a safe storage place within your home or vehicle.


People Also Ask (FAQs)

How long does it take to install a trailer hitch lock?

All the locks in our article should take less than 5 minutes to install, assuming they are a match for your hitch and trailer.

What is a locking hitch pin? How does a hitch pin work?

A locking hitch pin is simply a bar that goes between through the receiver and keeps the vehicle and trailer connected.

How long do these trailer locks last?

This depends on the lock and the conditions that the locks are used in. A good lock can last a lifetime, but without proper care, a lock can fail.

Where is the best place to buy the trailer hitch locks?

Amazon has a wide selection and prices for many budgets on trailer hitch locks.

What are the top brands of trailer locks?

Master Lock, Trimax, Proven Locks, AMPLock, and the other brands listed in our article are great options for trailer hitch locks.


Conclusion

When the sun gets low and its time to break for the night, be sure to get a lock that keeps your cargo safe and does not keep you up at night trying to install it. All of the locks in this article are great options, but the Proven Industries 2516 offers the most security and safety for a reasonable price and easy install.

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