Trimax - UMAX 50D - Trailer Lock for Hitch, Dual Purpose Transforms to U Lock - Trailer Hitch Lock for 1-7/8" - 2-5/16" Couplers, All Coupler Types

I have a lightweight tow dolly for pulling a slingshot. Once we get to destination, car and tow dolly stay in parking lot. Dolly is not very heavy, and I wanted to secure the tongue from nefarious actors. This fits the coupler very tightly, and combined with a chain thru the wheels to prevent dragging, my dolly should be secure. Unit appears strong. And I like the circular style keyway. Came quickly at a great price. Happy camper so far.

I did a ton of research for a trailer lock for a boat trailer. I settled on this one and there are zero regrets. This thing is tough, heavy metal and a solid well designed product. Forget the others, the reviews on this one are great because this really is. Easy to use, provides two keys, looks great and does what it should. Easy to set and remove. Couldn’t be more happy!

Very solid lock. Easy to install. Heavy weight and rugged.

Took awhile to get here and the package was banged up a little but everything was there. Looks to be well made and quality.

works as i should. Used on a bulldog hitch. Latches on both sides. Will only slow down a person with a battery operated grinder though.

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.

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!

Great security feature for my trailers. I plan to upgrade to a better option when this wears out.

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

Tengo 3 meses con el no se a oxidado con la lluvia, se ve muy bien por el momento

Sturdy and lock still works after over 1yr of use. Even cold winter weather -26C.

Todo bien. Hay que saber cómo colocarlo, pero una vez que lo entiendes, es sencillo.

Does what it claims. Rusted pretty quickly, though. Recommend treating mg with a rust repellant film of some sort.