5 Best trailer Coupler Lock - Review and Buying Guide [2021] - Car of Steel

5 Best trailer Coupler Lock – Review and Buying Guide [2021]

Best trailer coupler lockToday I am going to share you how to ensure trailer security.

(Step by step; with a comprehensive review)

A trailer is one of the most essential and expensive components of a vehicle. But, most of the case; users do not keep the focus on its required safety.

Sometimes you may need to go away from your trailer since trailer is an expensive piece of equipment, and also you can carry some valuable things, so you need to ensure the proper safety of your trailer. That’s why you need good quality safety gear.

I always advise my clients to emphasize on this vital fact. However, when it comes to the safety issue, My particular recommendation is using the best trailer coupler lock. Also have a look at the best travel trailer cover reviews.

Yes, no locks are entirely unbreakable. Then, what should you do?

Look: in this case; you have to pick up comparatively the better quality object (which is more effective and user-friendly).

And in this content: I share several best trailer coupler lock models with an inclusive description. Please also have a look at our trailer brake controller reviews.

Best Trailer Coupler Lock Comparison Chart:

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5 Best Trailer Coupler Lock Reviews [2021]

1. Master Lock – 4 Keyed Alike Universal Trailer Coupler Locks 379KA-4:

Master Lock - 4 Keyed Alike Universal Trailer Coupler Locks 379KA-4
Master Lock provides you with extraordinary service and complex-free mechanism. You can get this awesome toy within a friendly budget.

In plus, it gives a large number of advanced features with facilities. The best part is it comes in a robust construction.

Furthermore, the object is hugely corrosion protected. Unlike, the other cheap products, this is made of durable materials.

As a result: It can entirely resist the cutting and prying chance.

Apart from its durability and strength, this lock is highly versatile. Also, this is pretty compatible. This is entirely free from swing and prying.

You will get a simple DIY installation feature. Even, the removing process is effortless.

When your trailer is locked, anyone can not attach it with a trailer hitch or hitch ball, and no one can pull it up away. So your trailer will be 100% safe.


  • Powerful zinc alloy
  • Straight-forward installment and quick removing access
  • Prying resistant
  • Universal fitting

Usable only for mobile trailers

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2. REESE Towpower 72783 Universal Coupler Lock, Adjustable Storage Security, Heavy-Duty Steel:

REESE Towpower 72783 Universal Coupler Lock, Adjustable Storage Security, Heavy-Duty Steel
Reese Towpower gives your trailer ultimate protection. It keeps burglars away from your RV or trailer.

The exciting fact is breaking the lock quite impossible and a difficult job. They implement an advanced locking mechanism in their product to give over safety to their customers.

This massive object is consisting of a high-grade base with a resilient steel bar. Moreover, this is appropriately coated to resist decaying, damaging, chipping and sticking problem.

As well, it offers super adjustability and variable locking positions. And this is suitable for any standard sizes coupler easily.

Besides the high level of construction, it offers incredible visibility. Overall, this is a fantastic model with an excellent reinforcement capability.

A trailer hitch lock and a coupler are two different locks. You should also have a hitch pin lock that gives a different look of hitch receiver.


  • Adaptable locking bar
  • Visible painting
  • Rust protected
  • Compatible


The aluminum base is relatively a bit weaker.

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3. Reese Towpower 7042100 Adjustable Coupler Latch Lock:

Reese Towpower 7042100 Adjustable Coupler Latch Lock
This model is another excellent selection from Reese Towpower model. Its robust construction from sturdy materials delivers supreme confidence.

This is quite impossible to pry and cut. Additionally, you can keep safe from unwanted rusting, decaying and chipping.

It has an incredible level of reinforcement power. Cause, it includes high-grade nickel steel plate that is nicely coated.

Also, you will enjoy its mind-blowing appearance and advanced convenience.  Another remarkable fact is the company offers 2 keys and boasts variable six locking positions.

Its set-up procedure is noticeably easy and a DIY hack. It is perfect for a universal setting, and you can enjoy a smooth and reliable performance.


  • Sleek finish
  • Corrosion resistant design
  • Compatible
  • Adjustable
  • Long-lasting


No cons.

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4. Trimax UMAX100 Premium Universal ‘Solid Hardened Steel’ Trailer Lock (fits All couplers):

Trimax UMAX100 Premium Universal 'Solid Hardened Steel' Trailer Lock (fits All couplers)This fascinating product offers you unmatched high-grade performance. Also, it ensures optimum reliability and durability.

The coolest part is it featured with 360 degrees resilient steel construction.

It ensures maximum security of your travel trailer.

Thus provides a significant level of security and keeps it away from potential stealing and robbery.

You can use it for multiple functions. This is applicable for camping kits, marine boats, Recreational vehicles and different shorts of trailer.

This is highly decayed and rust-proof for its great coating support. Moreover, this provides a beautiful cover to protect dirt and dust particles.

In plus, the company offers the users a friendly installation feature with a simple operating system. Even, its storage and maintenance are simple enough.


  • Protective nylon cover
  • Attractive cover
  • Covered keyhole
  • Rugged design


  • Relatively expensive
  • A bit bulkier (6 lbs)

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5. Tow Ready (63228) ‘Gorilla Guard’ Coupler Lock for 2″ Couplers:

Tow Ready (63228) 'Gorilla Guard' Coupler Lock for 2" CouplersThis is particularly formulated for heavy-duty tasks. Also, you can use it for various purposes. Cause, these models come in fantastic versatility. It is quite durable too.

Its study formulation with an excellent coating finish intensifies the life span and makes it an adorable object. If you are a trailer owner, you should have this product.

It offers you a powerful locking, and it can reinforce a massive amount of pressure. These properties make the lock challenging to pry or cut. Moreover, this is highly decay and rust resistant.

And you can get this first coupler lock at a budget-friendly rate.

It would be a great pick for your trailer.


  • 2 keys options
  • Heavy-duty metal construction
  • Long-lasting
  • Difficult to break


No cons

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Best trailer coupler lock buying guide:

You have to be a bit tricky to select the exact coupler lock. You  can follow the given facts during the buying period:

Material construction:

The item must be generated with a quality metal sheet. In this case: I mainly prefer aluminum items. Cause, these are resilient but flexible and quite glossy.

Also, you can consider the zinc alloy. But always you should avoid the led and other toxic metals.

Lock size:

Lock size is another vital feature. To avoid the installation problem: the shape or dimension should be universal and secure fitting. You have to concern about the exact measurement.

Rusting and decaying protected:

It item should be coated or appropriately polished. As a result: the item can keep safe from quick damaging or decaying.  It will help to maximize its longevity and better performance.

Endurable and weather resistance:

The lock should be stable under every type of weather condition. Even in the extreme cold or hot season; it should be serviceable.

Moreover, it should have the capability to withstand a considerable amount of pressure.


Try to get the quality good at a cheap rate. Also, check the warranty period, compatibility and durability.

Better to ask the experts’ opinion before buying a coupler lock. Another crucial trick is: You can follow the users’ review to get accurate information about a specific product.

Trailer wheel lock:

Usually, a wheel lock is 26 to 28 inches diameter and near about 9 inches wide. This should be extremely weather resistant and should have high-volume pressure adjustment capacity. You can set the device for 13 inches to 16 inches wheel.

RV coupler lock:

I do not think you require any particular lock for your recreational vehicle. I think the excellent quality of any compatible product is good enough for your RV.

You can consider the following 2 brands:

  • Tow Ready 63228
  • Reese Towpower 7042100

Cause, these are universal in application and much reliable.

Trailer lock set:

In a set, you will get one or more keys, some extra accessories and a protective cover. Some companies can provide you with an informative manual guide.

Coupler safety pin:

This object is quite tiny but extremely sturdy. It helps to hold the balance and stability. Also, it is used to get a successful installation.

(Note: As the main package; it must be corrosion-proof)

Final verdict:

My final advice is: use the right lock and keep your trailer secure.

In the market: you will get several coupler locks. But, my opinion is the mentioned goods are the perfect options for you.

Cause, these are great in quality and confirms optimum reliability.

Also, these products have great market value.