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Worried about theft when you leave your trailer unattended? The BulletProof Hitches Extreme Duty Coupler Lock is constructed with super-durable hardened solid steel, providing unyielding security. Its robust housing can take blows and stand strong against tampering, ensuring your trailer remains right where you left it.
No more fumbling with multiple locks for different trailers. This coupler lock's design fits universally, accommodating 1-7/8", 2", and 2-5/16" ball couplers. Whether you're switching trailers or dealing with varied equipment, it simplifies your coupling needs with its universal application design.
Prevent unauthorized hookups and keep your trailer secure from every angle. The Surround Lock feature of the coupler lock ensures a tight, 360-degree fit around your trailer's coupler. This innovative protection means it will engage like a trailer ball, blocking anyone from attempting a tow-away theft.
Concerned about weather damage ruining your lock? Fear not, as this lock is built to withstand the elements. With its rust-resistant body and a rubber keyhole cover to keep moisture and debris out, it stands up to Mother Nature's worst, ensuring long-lasting durability and reliability.
Never worry about losing a key or needing multiple duplicates for different trailers. This coupler lock comes with two uniquely keyed keys, providing you with convenient access and top-notch security. You can enjoy peace of mind, knowing that only you can unlock it.
Tired of flimsy locks that are easy to meddle with? This lock features a dual-ratchet system, allowing it to clamp evenly around your coupler. It ensures tamper resistance, giving you confidence in your security measures whether your trailer's at home or on the road.
California residents: click here
Heavy duty!!
Just received the Coupler Lock today. Fits very well on my 2 5/5/16's coupler. It is a pretty nice unit and seems to be well made. Looks and feels pretty heavy duty. A little pricey but, I am very pleased with it.
This BulletProof Extreme Duty Coupler Lock is just what I needed for security on my new vacation trailer. It far exceeds a similar type lock that I had on my utility trailer.
Very strong and theft proof! I wish I would have had one of these hitch locks on one of my boat and trailers that was stole two weeks ago. I don’t think the thieves will be able to cut this lock off like the other regular kind of lock that I had used on the stolen boat and trailer.
This thing is well worth the money. Heavy duty very good fit well made and excellent materials. Would definitely recommend this to anybody with a Demco hitch.
works as expected, would have given 5 stars if it were manufactured in the U.S.A.
Worked great for my application!
Very well built. Easy to use. I am sure it will be a great detractor to theft of my trailer.
Heavy duty, easy to install, and very happy with this product.
The lock is built solid and should be a fast theft deterrent. I have owned and currently own several other brands of trailer locks and this one is by far the most robust and secure.
A real piece of machinery built to last and not be broken into!!!
Damn this thing is beefy!!!
Great product very heavy duty.
Awesome product.
Used the lock once and the locking tab literally fell off. Cheapest quality ever seen
It is freaking GREAT!!!!
What an easy lock! Heavy and robust.
Fast shipping, much better than Amazon !!!!
This thing is massive. Worth every penny. Fast service and delivered on time. I’m extremely happy with the entire experience.
Douglas 
5/24/2025
Great. I havent lost my trailer I guess the lock works great
Kate F.
5/27/2025
Douglas
5/24/2025
Great. Only wish the ball was 2 516. The ball falls out of the 2 516 coupler. Need to make them to fit the coupler size
Kate F.
5/27/2025
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Robert
6/15/2025
A year later and the tongue lock is still holding up very well. I am really pleased with this purchase. If you are looking for a secure trailer tongue lock, look no further. This particular lock should fit your needs as it has mine very well.