This Rebellion XD ball mount tongue lock enhances the security of your hitch setup. It is made from cast aluminum and mounts over the top of the vertical-shank attachment pins for a unique, integrated design. The lock has 1/4-turn lock activation and comes with two keys. The Rebellion XD adjustable ball mount is a leap forward in cushion hitch technology. It provides more control, confidence and a more comfortable ride, all while protecting your towing system from jerking, jarring and rattling. The Rebellion XD is not included in this package and must be purchased separately.