The trailer lock pin has an advanced hardened steel structure and a chromed plating which provides excellent rust and corrosion resistance. The 5/8" hitch pin hole allows it to lock your shackle hitch or multi ball receiver. All weather rubber key slot cover protects keyhole from moisture, dust, and rust. A 360-degree rotating head makes it easy to operate. Single key lock design makes it simple to unlock and lock. Ideal for 2" and 2-1/2" receivers..