TOPTOW is a well experienced manufacturer of towing accessories. We only craft products with the best quality. TOPTOW is branded trailering ang towing accessories supplier. We makes quality products for RV, towing, tailgating, off-road recoverying and trailering like ball hitches, drop hitches, hitch extenders, hitch adapters, RV bumper hitches, trailer coupler locks, hitch locks, hitch pins, cargo carriers, bike racks, etc. TOPTOW dogbone hitch pin lock fits most ball mounts and trailer receiver hitch with a 5/8” pin hole and usable active length is 3-1/2" span. The trailer receiver lock pin is made of one piece solid hardened steel, strong and durable. All-weather rubber key slot cap keeps the key hole away from rain, snow, moisture, dust, rust, protecting the internal lock mechanism. Package includes 1x 5/8" diameter lock pin, 1x lock head, 1 x rubber cap, 2 x tubular round keys. This dogbone style receiver lock is compatible with hitch rack, cargo hitch tray, bike rack, hitch ball and tow rope, ensure the towing safety.