Make your tow vehicle and trailer more secure. Like a hitch pin and clip, a hitch lock is designed to insert into the fastener hole in the side of a receiver tube in order to hold a ball mount or hitch-mounted accessory in place. CURT hitch lock allows you to lock your ball mount into your trailer hitch, deterring theft and preventing anyone from detaching your trailer at the ball mount and towing away your property without your permission. This CURT hitch lock features a deadbolt design and comes with a 5/8" pin diameter to fit a 2" or 2 1/2" 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. Dust cap keeps out the elements and prevents corrosion.* 5/8" diameter pin fits 2" or 2 1/2" receiver tubes * Includes two keys for added convenience