Trimax Locks 2-5/16" Steel Hitch Ball & Clamp Trailer Coupler Lock UMAX100 20-0462

Features an exclusive design that provides 360 deg of hardened 5/8 inch - 16mm steel shackle protection for unattended trailer. Provides instant security for camper, boat or trailer when they are not hooked up to vehicle. Also features 1/2 turn technology that cannot be false locked. Universal lock fits all couplers from 1-7/8 inch to 2-5/16 inch.