Receiver and Coupler Lock Set, Lock Type Push to Lock, For Use With Automotive and Towing, Marine Recreation, Trailer Receivers, Trailers, Vans and Moving Trucks, Hole Diameter 5/8 in, Vehicle Class III, IV, Features Adjustable Coupler Latch Lock, K1 Key Blank, Keyed Alike, Push to Lock Locking Mechanism, Weather Tough Seal and Water Tight Cap, Includes (2) Keys, Finish Stainless Steel