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Your cart is empty. The Trimax UMAX100 coupler lock features an exclusive design that provides 360 degrees of hardened steel protection for your unattended trailer. It provides instant security for your camper, boat, or trailer when they are not hooked up to your vehicle. This lock features a huge 6-tooth, 3/8" dual ratchet locking system, a hardened 5/8" 16mm steel shackle, and 1/2-turn technology that cannot be false locked. For dual force security, add a Trimax chain or cable secured to an anchor point. Also, add a Trimax coupler lever lock for additional protection.
This lock is easy to install--simply slide the ball up into coupler and replace the U-shackle. The UMAX100 fits all of the following couplers and more: 1-7/8" or 2" Fulton, Atwood 2", UFP, Bulldog, 2-5/16" couplers, Fulton Heavy Duty, Surge Brake (reverse mount). Tested to be tough..
customer x
2025-08-25 13:40:05
This lock is very sturdy and easy to use.
James
2025-08-10 13:46:26
Been using for almost 4 years now and it has stood up against Houstons harsh weather conditions.
Harry Gonzalez
2025-07-30 12:09:08
It’s a great item but it only works for very small towing trailer and NOT TRAVEL TRAILERS. : /
GW
2025-07-04 16:35:31
Took awhile to get here and the package was banged up a little but everything was there. Looks to be well made and quality.
Gregory K Carver
2025-07-01 14:32:45
This thing is a beast! And first of all you're probably wondering "is this a real review?" Well you're dabbed straight it is! I've had this thing for about a year now, and it works great!Ive seen some other reviews and Let's be honest... a lock (any lock) is only as good as a thiefs determination. But it gives me piece of mind that my trailer is at least somewhat safe.But I'm writing this review mainly because, I lost my lock. I left it on my trailer bed and drove off and lost it on the freeway going 70mph. Well that was two weeks ago so I ordered a new one (thankfully I haven't opened it yet) and I'm driving today, AND LO AND BEHOLD ON THE SIDE OF THE FREEWAY, I SEE MY LOCK!!A couple u-turns later I pull up, snag it and there's barely a few scratches on it! I think to myself "well the lock has got to be broken or something" get home, pop in the key, and bam! It works 100% I couldn't believe it!Long story long. If you're gonna buy a trailer lock.... this is the one to buy!
Frances Brennan
2025-05-27 16:21:10
Great for camper security
REB
2025-03-17 10:28:47
This lock is much stronger than what I previously had. I like that it locks on both sides of the u-shaped bar, meaning that a their would have to cut through the left and right side both before this would fail.
Customer
2025-03-10 12:17:29
Rock solid. I can't think of a way I could get this off other than messing with picking the core. Leagues beyond those crappy little yellow locks you see everywhere, and the best you can get unless you want to spend a fortune.If I was nitpicking, the lock core is what it is. Probably the best choice given the price range, and I'm not sure anyone is going to be out there with a specialized tool picking it anyway. One issue is that the little cover tore off its rubber strap but it's no biggy. I could see the lock having issues if I lost that cover and water started collecting in it, would be nice to have a tougher cover.
Big Nafus
2025-02-21 15:28:39
Hardened steel shafts wouldn't be easy to cut, and a thief would need to cut both shafts to remove the device from the hitch. Insurance company approved which is the important thing to consider, cheap units generally are not approved by insurers as a legitimate tow hitch security device. Be mindful when buying a hitch lock that there is little point of skimping on a cheap hitch lock to secure a significantly priced asset! I do not see the point!
User
2025-01-16 21:57:53
Feels solid, pretty heavy.Locks as intended, no problems.I sprayed the keyhole right away with anti rust lubricant, just in case.My advice is to order if sold by Amazon, I ordered from a third party seller (RNR Camper), the lock packaging (not Amazon box) was all torn up, even the previous customer info was still inside
VoteForPedro
2025-01-04 10:01:34
As it should
GarlicWitch
2024-12-10 17:53:03
Tengo 3 meses con el no se a oxidado con la lluvia, se ve muy bien por el momento
Customer
2024-11-29 10:08:05
This is the 2nd one we bought for our trailers and they work perfect ...very effective, strong and durable...will recommend this product to protect your trailer from theft ..
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