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Dual-ratchet locking system and ballistic nylon housing with a hardened steel shackle provide 360 degrees of protection for your trailer coupler. Heavy-duty housing can take a beating, giving you peace of mind when you leave your trailer unattended.
Features:
Specs:
You can lock your trailer coupler with a padlock, but it might not provide enough security to keep your trailer safe. A padlock can only be used to lock the coupler latch on your coupler, and to fit through the latch, the shackle on it has to be pretty thin. That means the shackle on a padlock is typically easy to cut.
The shackle on this wraparound lock is considerably thicker than a standard padlock shackle, making it harder to cut through. Also, because the shackle on this lock wraps around the head of your coupler instead of just fitting through the tiny latch, it just plain looks more secure.
The built-in ball on this lock engages in your coupler's ball socket, completely blocking the opening to prevent any tampering. The shackle fits over your coupler and ratchets down tightly and evenly. Because it ratchets on both sides, even if someone manages to slice through the shackle, it won't be enough to remove the lock. A (patient) thief would have to cut the thick shackle in multiple places to work it off of your coupler.
To install this lock on your trailer:
First, remove the shackle and insert the ball plug into your coupler's ball socket.
Then, position the shackle over your coupler and line it up with the holes in the lock body. Push the shackle down, ratcheting it until it's snug around the coupler.
Customer Satisfaction Score:
99% were satisfied with this product
1% of customers were not satisfied
Ratings & Reviews
Awful customer service. Took almost two months for my items to be delivered to my house. Will never buy anything from this website again.
Great lock!!!!
Good fit on square ended coupler.
Works Great
Good quality
The lock is very hefty. I haven’t got my trailer yet, so as soon as I do, it’ll be the first thing I put on it when not in use.
Best coupler lock in this style. Great value.
I like this coupler lock. I wanted something that would "hopefully" deter people from wanting to "borrow" my trailer. It fits nice and snug!
Trailer is still here... lol
I have 6 of these on different trailers. Great locks and provide good security for your average trailer.
Turning the keys in the lock is a bit sticky right out-of-the-box. The black plastic casing feels very light-weight - will have to see if it can hold up to winters in the Northeast or if it'll crack.
Works well as described. Not affected by a year of weather. I recommend it.
I've researched many types of trailer coupler locks and I think I found this Trimax Dual Purpose Coupler Lock to be the best fit for my application. It is heavy duty and I like that the key lock is protected by a flip-back cover to protect the key insertion area from the elements. It is easy to use and I'm confident this lock will provide years of security for my trailer.
Fits my coupler really well. Other lock I bought didn’t fit because my coupler doesn’t have a flange
After one year outside in all weathers, the lock still looks and works great.
The overall quality seems excellent! The locks work smoothly and will be perfect for my Ranger trailer and Seadoo trailer. I was also surprised to see both locks were keyed the same. A big plus in this case.
Great product. It has been in use for over a year in all kinds of weather without issue.
USED IT TO REPLACE A REESE HD ONE THAT THE LOCK FAILED THE SECOND TIME USED
Michael
2/13/2025
Still working great!
Jesse M.
2/13/2025
This “lock” is made of plastic. I’d have to disassemble it to know whether or not it can really secure my trailer; however, I can not do that and will not be using it on my trailer.
I lock the lock but the front key cover slide arrived broken. I had no time to ship back so I just kept it. I would say it's the shippers fault, leave it at that, and rate the product higher, but I don't necessarily like the plastic slide cover over the key. To me it's a cheap design and inevitable to break at some point regardless.
Very well made. Easy to use.
Trimax is the best universal trailer lock I have ever used for locking up my trailer I would recommend it to anyone.
Great quality and easy to use.
Excellent value
I have used this lock with my travel trailer for the past year and no one has stolen the trailer. The only issue has been that the sliding cover over the key access has shattered, so that means that I no longer have weather protection for the lock mechanism. I don't know the reason why it was broken. It could have been the lawn mower got too close or someone deliberately tried to break the lock. The rest of the plastic has held up fine and shows no signs of tampering. The lock is still operating smoothly and locks and unlocks easily with the key.
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Bryan
2/9/2024
Still very pleased.