The TBB3 features a triple plated chrome finish and hardened steel and provides instant security for your camper, boat or trailer by securing your vehicle receiver hitch. Features patented 1/4 turn technology that cannot be false locked. * The 5/8" pin fits all Class III, IV and V receiver hitches * O ring keeps water, grime and dirt out of locking mechanism to ensure years of use * Protective rubber cap protects keyhole from water, grime and dirt * Strongest locking pin on the market * Type A key which is a spring loaded, 7 pin, high security key. Resists attempted drill outs. Rugged and durable, the key will not bend or break. * LIFETIME WARRANTY