Hitch Receiver Lock protects your hitch-mounted accessories against theft Get our hitch receiver lock to protect your ball mount and hitch ball from being stolen. Chrome-electroplated hitch receiver lock includes a PVC cap that protects the keyhole by keeping out dirt and corrosion. Includes 2 keys, so you’ll always have a spare on hand. The hitch lock steel pin length is 2-3/4", with a diameter of 5/8". Hitch lock’s shear-tested to 75,000 PSI.