Review on Enhanced Trailer Coupler and U-Lock: Trimax UMAX50D Universal Dual Purpose by David Tadder

I needed a security device for my food trailer and after trying a few lower quality locks (one broke on a key lock and the other didn't fit the tongue ) I found this solid clutch lock that worked great. It adapts perfectly to the round shape of the ball hitch. And the advice I learned from the one that broke is to add some WD40 to the teeth (both sides) for smooth operation and rust protection. Definitely worth keeping your belongings safe!