Trimax Locks Trimax Ultra-Max Universal Dual Purpose Coupler Lock

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 in. dual ratchet locking system, a hardened 5/8 in. 16mm steel shackle, and 1/2-turn technology that cannot be false locked.