Tow Ready part # 63223 trailer hitch receiver lock uses a 5/8" bent pin and simple snap on padlock to prevent theft of ball mounts, drawbars, bike racks, cargo carriers, and other trailer hitch accessories. The chrome plated pin and covered key slot prevents rust and corrosion. This kit fits 2" and 2-1/2" sq. recievers and comes with pin, padlock, and 2 keys.