10 Best Trailer Hitch Locks (Reviews 2021)

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One thing that is a must have for trailer owners is a high quality trailer hitch lock. It’s essential for making sure that the trailer stays where you leave it, keeping it secure from thieves. It works by keeping the hitch and receiver locked together so that other vehicles can’t connect to your trailer. And since hitch locks come in a variety of shapes and sizes, you’re guaranteed to find one that would be compatible with your particular vehicle. And to help you make the right choice, we’ve compiled a list of the 10 best trailer hitch locks in 2021.

10 Best Trailer Hitch Locks in 2021

Image Product name Details Check price
most popular hitch pin lock Master Lock 2866DAT
  • For 1/2" and 5/8" receivers
universal coupler lock REESE Towpower 72783
  • For 1-⅞”, 2”, and 2-5/16” couplers
universal trailer coupler lock Master Lock 389DAT
  • For 1-7/8", 2", and 2-5/16" couplers
recommended trailer hitch lock Connor 1615320
  • For 1-1/4", 2", and 2-1/2" receivers
heavy duty locking hitch pin Cocoweb HL-58BK
  • For 5/8" receivers
trailer lock for rvs Master Lock 377KA
  • For 1-7/8", 2", and 2-5/16" couplers
durable receiver hitch lock CURT 23518
  • For 2" receivers
trailer tongue lock Trimax UMAX100
  • For 1-7/8", 2", and 2-5/16" couplers
utility trailer locking device Motormic 1705
  • For 1-1/4", 2" and 2-1/2" receivers
heavy duty trailer locking device Tow Ready 63228
  • For 2" couplers

Top Rated Trailer Hitch Locks Reviewed

Master Lock 2866DAT Trailer Hitch Lock

best trailer hitch lockOur first recommendation of the best trailer coupler lock is the Master Lock 2866DAT. It comes from a manufacturer that has built a reputation for providing high quality products. And you will see many other of its hitch locks on this list, which have been picked for this very same reason.

This lock comes with two trailer hitch pins of two different sizes. They are designed to fit 1/2 inch and ⅝ inch receivers, so it’s compatible with class I to IV hitches. And the usable length is 2-3/4 inches. So, measure the outside of your hitch to make sure that this lock is long enough.

It’s also a very sturdy lock that can easily handle whatever you need to tow. The 1/2 inch hitch lock pin is rated at 3,500 lbs and the ⅝ inch pin is rated up to 10,000 lbs.

The lock is also very easy to use with simple locking and unlocking. Just slide in the pin into the hitch, then push the lock head onto the pin and remove the key. The head also swivels, providing easier access in tight areas.

Moreover, the advanced locking mechanism features a four-pin cylinder, which is designed to prevent lock picking and ensuring that your trailer stays in place.

This trailer hitch lock is also designed to withstand outdoor elements, such as dirt and moisture. It features a snap-on cover, which keeps the keyway watertight and weather resistant.

However, it’s worth mentioning that this trailer hitch lock has a few durability concerns. First of all, it doesn’t seem to have corrosion resistance, so it might start to rust if not protected from outdoor elements. And secondly, the key that comes with the lock is not of the best quality.


  • Fits 1/2 and ⅝ inch hitches.
  • Supports classes I-IV.
  • Four-pin cylinder.
  • Weatherproof cap.
  • Locking head rotates 360 degrees.
  • Easy to use.
  • The keys are made of soft metal so they tend to bend when you lock or unlock the device.
  • Not corrosion resistant.

Reese Towpower 72783 Universal Coupler Lock

trailer hitch lock reviewsThe Reese Towpower 72783 is also one of the best trailer tongue locks due to its highly durable design. It’s built with a very strong structure that features an aluminum body and heavy duty steel U-bar that is difficult to cut through or force open.

Another advantage of this trailer locking device is its universal design. It features 11 locking positions, so it can be adjusted to fit a wide variety of couplers. It can fit 1-7/8″, 2″, and 2-5/16″.

Using the ratched design, you can easily adjust the lock’s position to suit your needs. And just as easy you can unlock it. Just put in the key, turn it and remove the U-bar.

This trailer hitch lock also acts as a great theft deterrent due to the bright yellow color of its design. It offers visible protection, scaring anyone who might be looking to quickly steal your trailer. And if anyone does try to pry the lock, it features an advanced locking mechanism that resists picking and drill-outs.

The downside of this unit is the aluminum body construction. It makes the lock a bit flimsy and with just a few hammer blows, it could be destroyed. Hardened steel would’ve been a more durable option.

So, keep in mind that if someone is determined enough, they could still steal your trailer. But this lock will definitely make them think twice about doing it or at the minimum, will slow them down.


  • Made to fit a variety of couplers.
  • Durable design.
  • Great visual deterrent.
  • Advanced lock.
  • Easy to install.
  • Includes an extra key.
  • The aluminum body can be hammered to pieces with just a few blows.
  • Flimsy keys.

Master Lock 389DAT

top rated trailer hitch lockAnother popular trailer hitch lock in 2021 is the Master Lock 389DAT. It’s one of the best selling travel trailer hitch locks due to a number of reasons. It’s durable, it makes a great visual deterrent and it is very simple to use.

The first thing worth noting about this coupler lock is its versatility. It’s designed to fit a variety of couplers, including 1-7/8″, 2″, and 2-5/16″ couplers. So, while the universal term that the manufacturer uses might be a stretch for this lock, it does fit a variety of trailer setups.

Furthermore, the bright red color of the lock will make it really stand out in public, deterring most of the would-be thieves. It’s definitely an eye catching color that will discourage thieves from messing with your trailer.

The robust design of the lock provides further security against theft. It’s made of forged steel, making it difficult to remove without the key. On top of that, the lock features an advanced mechanism that is designed to resist picking and prying. However, as most trailer hitch locks in this price range, if a determined thief has set their sights on your trailer, they can still break the lock with a pry bar and some leverage.

One more important feature of this trailer lock is that it is corrosion resistant, which is essential for an item that will be exposed to outdoor elements.

This trailer locking device is also easy to use. You fit it onto your coupler, lock it and it secures the coupler area so that thieves can’t just back up to your trailer, hook it up and drive away.

The downside of this trailer hitch lock is the key design, which is not unique to this particular hitch lock. Some users mentioned that they were able to open their lock with keys from a different Master Lock trailer locking device.


  • Designed to fit a variety of trailer couplers.
  • Robust structure.
  • Corrosion resistant.
  • Advanced locking mechanism.
  • Powder coated with red paint.
  • Quick and easy to use.
  • Doesn’t have a unique key design.

Connor 1615320

best trailer coupler lockIf you’re looking for one of the best locking hitch pins, then we recommend checking out the Connor 1615190 model. It’s durable, strong, and is designed to fit most hitch setups.

The hitch pin features a patented design that is crafted from heavy duty solid steel. It offers dependable strength, keeping your trailer secure from theft and during towing. It is capable of towing trailers up to 20,000 GTW.

For added durability, the hitch pin also features a weather-proof key slot cap. It’s designed to prevent any dirt or moisture from getting into the locking mechanism, ensuring its longer life without damage.

The versatility of this trailer hitch pin makes it compatible with most hitch setups. It fits all classes III-V receivers, such as 2 inch and 2-1/2 inch receivers. And it has 3-1/2 inches of usable length, which is plenty long for most hitches.

Due to the innovative auto lock mechanism, this device is also very easy to use. To lock this hitch pin, you just need to turn the key to unlock the head lock. Then, after removing the key, push the head onto the pin. And once you hear it click, it’s locked.


  • Fits classes III-V receivers.
  • Automatic lock.
  • Durable structure with minimal moving parts.
  • Offers dependable strength.
  • Includes O-rings for a snug fit on a hitch.
  • Key slot cover.
  • Includes 2 keys.
  • Some users found it to be longer than needed.
  • A few other users had issues with it getting frozen in the lock position.

Cocoweb HL-58BK

best locking hitch pinOur next pick for the best trailer hitch pin lock is the Cocoweb HL-58BK. It’s designed to safely secure your towing trailer, keeping your mind at ease that it will stay attached to your vehicle and free from theft.

There are two options for this travel trailer hitch lock. One comes with a ⅝ inch pin and the other with a 1/2 inch one. So, you can choose the size according to your existing hitch setup. This ensures a more snug fit without worrying about it wobbling, which you often experience with universal sized hitch locks.

The shaft length between the end caps is 3.45 inches. So, be sure to measure your receiver to ensure that this hitch pin is long enough.

This trailer locking device is also highly durable. It’s made of heavy duty solid steel, guaranteeing that your hitch stays safe and secure. Moreover, the lock includes a weather resistant cap that fits over the locking mechanism and prevents any grime or water from getting inside.

One more advantage of this device is how easy it is to lock it. You don’t need to do any installation or drilling. You simply slide in the pin, push onto it the locking section and it’s ready to go.


  • Comes in 1/2″ and 5/8″ pin options.
  • A weather proof rubber cap over the locking mechanism.
  • Simple to use without any installation.
  • Barbell locking mechanism for a more snug fit.
  • Includes a spare key.
  • Not corrosion resistant.

Master Lock 377KA

good trailer tongue lockMaster Lock makes it to our list with one more high quality trailer hitch lock. It’s a versatile, durable, and strong lock with not much to complain about.

What makes this trailer hitch lock so durable is the zinc construction. It helps the lock to stay corrosion and rust free. Moreover, it’s a strong material that is not easy to break or pry with a bar.

As for versatility, this hitch lock is designed to fit most trailer couplers, such as 1-7/8″, 2″, and 2-5/16″ ones. However, keep in mind that it fits better 2″ and smaller hitches. It feels a bit sloppy on a 2-5/16″ coupler.

This lock also comes with a limited lifetime warranty, which gives peace of mind if you find some fault in the product. Most other trailer hitch locks in this price category have a very short warranty period or no warranty at all.

The only problem with this trailer locking device, as with many other similar locks, is that it comes with a key that is not unique to this particular device. So, if someone has the same lock or a similar one, they could easily open yours.


  • Fits most trailer couplers.
  • Advanced locking mechanism.
  • Zinc body for corrosion resistance.
  • Includes a spare key.
  • Limited lifetime warranty.
  • The key is not unique.

Curt 23518

most secure hitch pin lockOne more great trailer hitch pin lock product is the Curt 23518 model. It’s durable, easy to use and it offers dependable security for your travel trailer.

The lock features a pin that measures ⅝ inches in diameter and it offers 2.85 inches of usable length. With these dimensions, this hitch pin lock is compatible with most 2″ x 2″ hitch receivers, with the exception of hitches that have double walled receiver tubes. As for the usable length of the hitch lock, it measures 2.850 inches.

The high strength steel construction of the lock provides reliable security, preventing potential theft of your trailer. For durability, it also features a watertight cap on the key slot. It protects the mechanism from outdoor elements, dust, and dirt. This ensures that the outdoor weather doesn’t affect the lifespan of your trailer hitch lock.

On top of that, the entire hitch lock is powder coated with a durable finish that not only gives it an attractive look but also provides corrosion resistant qualities.

There are two keys included with this trailer hitch pin lock. And the main drawback of this lock is the keys. They are made of plastic so when used to lock or unlock they can bend or even break. But at least you get a spare key in case the first one breaks.


  • Fits most 2″ x 2″ hitch receivers.
  • Solidly built.
  • Watertight key slot.
  • Corrosion resistant finish.
  • Includes a spare key.
  • Cheap plastic keys.

Trimax Umax100

strongest trailer locking deviceAnother popular trailer hitch lock brand is Trimax and one of their most popular products is the Umax100. It’s versatile, durable and it provides the perfect reinforcement for your trailer’s security.

The construction of this lock is made of hardened steel, making it one of the strongest trailer hitch locks on the market. Trying to break this lock with just a few hammer blows won’t work. It would take a lot more effort and time, complicating the thief’s intentions.

To make things even more complicated for the thief, the lock also features a dual ratchet system of the locking mechanism. This makes it more difficult for someone to pick or pry the lock open.

It’s also a very durable lock. In addition to the hardened steel construction, it also features ballistic grade nylon housing and a cover for the key cole, protecting it from dirt and grime.

The trailer hitch lock features a universal fit, meaning that it fits most couplers, such as 1-⅞”, 2″, and 2-5/15″ couplers. On one hand, that’s a good thing since you can be sure that it will fit your hitch. But, on the other hand, this often results in the fit being too sloppy or loose on larger hitches. In this case, you would need to purchase extra washers and add it to the lock to make the fit more snug.


  • One size fits all.
  • Hardened steel construction.
  • Ballistic grade nylon housing.
  • Key hole cover.
  • Dual ratchet lock system.
  • Simple to install and use.
  • Can be too loose on larger hitches.

Motormic 1705

strongest trailer hitch pin lockMotormic also offers one of the most secure hitch pin locks. It’s built for reliable security, ensuring that your trailer stays where it should when you’re towing it or when it’s in storage. Everything about this device is top notch, making it one of the top recommended trailer hitch locks.

This trailer locking system comes as a kit that includes two hitch pin locks. The 1/2″ and 5/8″ pin locks are designed to fit any type of receiver lock. On top of that, the extended 3-1/2″ length of the shaft means that it’s also compatible with hitches on Toyota Tundra, Ford F-150, etc. And if you’ll still find the fit too loose, the lock comes with 5 O-rings that you can add to adjust the lock for a perfect fit.

It’s a heavy duty trailer hitch pin lock that is made from one piece of hardened steel, ensuring reliable security. Moreover, it’s a durable lock. It’s powder coated with black paint, which provides protection against rust and corrosion.

Also, there’s protection for the key slot. It’s covered with a silicon cap, providing protection against dirt or grime that could otherwise damage the mechanism.


  • Fits all types of hitch receivers.
  • Extra long shaft.
  • Includes O-rings for adjusting the fit.
  • Made of forged steel.
  • Corrosion resistant finish.
  • Key slot cover.
  • Simple push-to-lock mechanism.
  • Includes two sets of keys.
  • The cap on the key slot doesn’t sit very tight and may fall off.

Tow Ready 63228 Gorilla Guard

high quality caravan hitch lockThe last pick for our top 10 trailer hitch lock recommendations is the Tow Ready 63228 Gorilla Guard model. It’s a heavy duty coupler lock that is made from high grade materials in order to withstand whatever man or nature can throw at it.

Not only is it strong enough to withstand hammer blows but it’s also made to withstand picking or prying the lock. It’s designed in a way that shields the lock from tempering devices. This gives you peace of mind that it will not be picked and leaving you assured that it will stay in place.

It’s a great trailer hitch lock choice for those who have a 2 inch trailer coupler. However, still make sure to measure your hitch, as well as the coupler lip. This locking system is compatible with your hitch if the height of the coupler with the lip is 3-13/16 inches or lower. And the height of the coupler lip is 5/16 inches or lower.


  • Fits most 2 inch trailer couplers.
  • Made of high grade metal.
  • The lock is shielded from tempering devices.
  • Easy to use.
  • Comes with 2 keys.
  • This is not a universally sized trailer hitch lock, so make sure that it fits your hitch.

What Is a Trailer Hitch Lock?

A trailer hitch lock is a special device that is designed to stop and deter thieves from stealing your vehicle. Its purpose is to keep the trailer’s hitch and the receiver together. Once locked, it prevents anyone from lifting the receiver. To unhitch the trailer, you need to unlock the device.

In most cases, a trailer hitch lock is more of a deterrent for thieves. If someone has set their eyes on your trailer, they can still find a way to do it. So, in order to prevent your trailer from being stolen, the additional steps you should always take.

Types of Trailer Hitch Locks

There is a wide variety of hitch locks available but most of them fall into two categories: coupler locks and receiver locks.

  1. Coupler locks feature a U-bolt design that fits over the coupler on the trailer’s tongue. They can also have ball-shaped tops that attach to the ball mount on the hitch receiver. It locks the tongue to the ball mount.
  2. Hitch receivers feature a pin lock design. They look like a dog pone with a narrow part in the middle and thicker parts on the ends, making it difficult to just pull it out. One of the ends is the lock head that can detach for unlocking or attach for locking. The pin slides into the fastener hole, keeping together the hitch and the frame of your RV.

Benefits of Trailer Hitch Locks

  1. Prevent theft. These trailer locking systems will prevent anyone from hooking up your unattended trailer to their own vehicle. It would be difficult for them to break or unlock the device without a key.
  2. Visual theft deterrent. Trailer hitch locks are usually easily noticeable. A small time thief can see that there’s some protection added to your trailer’s security and will think twice about tampering with your vehicle.
  3. Gives you peace of mind. Knowing that your trailer will stay where you left it will give you peace of mind when you leave it behind. You’ll be able to stop worrying that it will get stolen.
  4. Saves you money. Adding this extra layer of security is also a good way to save some cash. If you don’t have your trailer secured with a lock, a thief could easily get away with it and all the valuables you might be keeping inside. This would lead to great expenditures, such as buying a new trailer and new RV gear. Getting a trailer hitch lock would help to avoid these expenditures.

Best Trailer Hitch Lock Buying Guide

Just like with any other product, it can be helpful to know what exactly to look for in order to ensure that you buy the best possible trailer locking device. There are plenty of options available on the market, which can make it confusing to decide which one would be the right one for your particular situation. That’s why it’s important to understand what are the features that make a good quality trailer hitch lock. Read on to learn about these trailer hitch lock features and take them into account when making a buying decision.

Construction Quality

The trailer hitch lock should obviously have a heavy duty construction. Otherwise, anyone would be able to easily tamper with it with just a few hammer blows. This means that you should look for a lock that is made of high quality and high strength materials.

The two most common materials used are steel and aluminum. However, the better option is steel.

  1. A lock made from hardened steel will be strong and durable, making it more difficult to break it. However, the disadvantage of steel is that it’s prone to rust and corrosion. So, if you’re buying a trailer hitch lock made of steel, check that it has a coating that offers corrosion resistant qualities.
  2. Some manufacturers use aluminum, which is also strong but more lightweight compared to steel. This makes it easier to tamper with them and a thief could break it with a hammer. The main advantage of aluminum, though, is that it’s corrosion resistant, even if it doesn’t have a protective finish.

Hitch Size

Hitches come in their own class. They range from class I to V. You need to know the class of your hitch in order to find a hitch lock that would be compatible with it. If you buy a wrong sized lock, you will not be able to use it properly.

Typically, trailer receiver locks come in either ½ inch or ⅝ inch locks. Meanwhile, coupler locks are made to fit 1-7/8″, 2″, and 2-5/15″ couplers.

If you’re opting for a trailer hitch pin lock, it’s also important to know the shaft length of the lock. If it’s too short for your receiver, you won’t be able to lock it.

But to be sure that you won’t be buying a useless product, measure the exact size of your hitch. This would ensure that you’ll get the best fit for your needs.

If you want to be on the safe side, you can alternatively buy a trailer hitch lock that has a universal size. These are typically adjustable to fit most receivers. They often come with removable washers that you can add if you need to make a more snug fit.

Lock Design

Another important factor that determines the quality of a trailer hitch lock is the lock design. The lock mechanism should have features that would make it difficult for picking or prying.

When choosing between trailer hitch locks, also check if the keys that come with it are unique to your particular lock. Many manufacturers reuse the same key design for multiple locks, which makes it easy for a criminal to unlock and steal your trailer. So, be sure that the lock comes with a unique key.


Since a trailer locking device is meant to be left outside for extended periods of time, it needs some protection against the outdoor elements. One of the common concerns with these locks is that they become rusted and corroded with time. To make sure that the lock you buy avoids this, check for corrosion and rust resistant features, especially if it’s made from steel. Manufacturers usually add a powder coated finish that offers this protection.

Moreover, it’s an advantage if the locking mechanism is also weatherproofed. It should have a watertight cap that covers the key slot. This will prevent any grime or dirt from getting inside and damaging the mechanism.

Ease of Use

A good trailer hitch lock should also be easy to use, especially if you tow regularly. It should be easy to install and lock or unlock.

You can check user’s feedback to understand more about how the lock performs in the real world.


As with any purchase, the price of the trailer hitch lock should also be a consideration. So, set a budget that you’re ready to spend and look for a lock in its range. However, fortunately, most of these locks are inexpensive. It’s easy to find one even if your budget is very low. One thing to keep in mind, though, is that coupler locks are usually a bit more expensive than hitch pin locks.

Trailer Hitch Locks Frequently Asked Questions

What are trailer hitch locks made of?

Most trailer hitch locks are made of either hardened steel or aluminum. Steel is a more strong and durable option. However, it does need to have some corrosion resistant coating. Aluminum is also commonly used but it’s not as strong as steel.

How to choose the correct size trailer hitch lock?

To make sure that you choose the correct size trailer hitch lock, start by measuring the opening of your vehicle’s hitch. Then, find a lock that would be compatible with that size. If you’re buying a hitch pin lock, then your size would be either 1/2 inch or ⅝ inches. And in the case of a coupler lock, you’ll most likely be looking at sizes 1-⅞, 2, or 2-5/15 inches.

How to use a trailer hitch lock?

The process for locking or unlocking your trailer hitch lock will depend on the particular one that you have. It’s best to refer to the instruction manual that came with the product for more specific instructions.

What to do if you lose your lock’s key?

Most of these locks come with a set of two keys. However, if you also lose the spare one, you can call a locksmith who would help you unlock it. Alternatively, you can contact the manufacturer to find out if they can provide a replacement key for your particular lock.

Can I remove a trailer hitch lock without a key?

If you lost the keys or the keys broke inside the trailer hitch lock, you could get a locksmith to unlock it. Alternatively, you can try freezing it and then giving it a good shot with a hammer. Otherwise, an angle grinder or some other metal cutting tool can also do the job.

How to unlock a trailer hitch lock?

If you have a hitch pin lock, you will need to have the keys that came with it. You need to insert it into the lock head, turn it and pull it out of the pin. That’s how they are typically unlocked. However, it might be different for your particular lock so for more specific instructions, consult the manual.

Are keys unique to each trailer hitch pin lock?

Some manufacturers do use the same keys for multiple of their products. However, there are also plenty of manufacturers that supply locks each with a unique set of keys. You should do some research to make sure that the lock you’re buying does come with keys that are laser cut and unique.

What are good trailer hitch lock brands?

The following are the most popular brands in the industry:

  1. Master Lock. This brand was founded in 1921, so they’ve been on the market for quite a few years. In the beginning, they were making padlocks for bank vaults. Today, they are focusing more on locks for trailers, caravans, and other vehicles. They offer some of the best trailer locking devices.
  2. Reese Tow Power. This is another popular brand that has been developing trailer hitch since 1952. In addition to locks, they also provide other towing and trailer equipment and accessories.
  3. Trimax. It’s one of the world’s leading lock manufacturers. They have gained a reputation for providing good quality locks and they constantly analyze market conditioners for developing products that meet the demands of the customers.
  4. Connor. This brand has been on the market for over 15 years. They continually produce new products that are in tune with the market’s demand.

Other Ways to Prevent Trailer Theft

  1. Hitch locks can definitely help prevent anyone from taking your trailer. However, they are not the only way to keep your trailer safe from thieves. Here are a few other recommendations.
  2. Invest in a wheel lock. These devices are similar to those used on illegally parked cars. The same as with hitch locks, wheel locks also act as both visual deterrents and physical anti-theft prevention.
  3. Park in a frequently visited area. If a thief wants your trailer badly enough, a hitch lock won’t stop them. However, if you park in a well lit public area with people around, it will considerably lower the chances of someone trying to steal the trailer.
  4. If you’ll be leaving your trailer in storage for a long time, empty it of any valuables. An empty trailer would not be appealing to thieves. So, unload your cargo and store it somewhere more secure.
  5. Install a GPS tracking device. This might not help prevent theft but it will help counter its effects. A GPS tracker can help the authorities locate your stolen trailer, increasing the chances of it returning to you.
  6. Install an alarm. Trailer alarms work similarly to car alarms. If someone will try messing with your trailer, it will start making that annoying sound that everyone hates.
  7. Consider getting insurance. If you’re really worried about a trailer getting stolen, consider getting insurance that provides coverage for theft or damage.

Final Thoughts

Our top pick for the best trailer hitch lock in 2021 is the Master Lock 2866DAT. It’s a tough hitch lock that can take the strain of a heavy load. It’s not easy to break or pry the lock open. With that being said, depending on your preference and hitch setup, one of the other models might be a better option for you. So, spend some time doing research, consider the factors that we’ve mentioned in our buying guide and choose a trailer hitch lock according to your needs.

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