This CURT hitch lock features a deadbolt design and comes with a 1/2" pin diameter with a 5/8" diameter adapter sleeve. This allows it to be used on either a 1-1/4" or 2" receiver tube size. CURT deadbolt hitch locks have a solid, square-shaped lock mechanism and a bent handle for easier gripping. They are key-operated and activate with a simple 1/4-turn. They also come with a watertight dust cap to keep out the elements and prevent corrosion.