Fits 5/8in (16mm) receivers Usable length of receiver pin is 2-3/4 in. (70mm) Push to Lock locking mechanism - push lock body onto pin firmly and remove key Weather Tough seal and water tight cap protects lock from moisture and dirt Class III/IV; 10, 000 lb. Load Rating 4-pin cylinder for added pick resistance Same key opens both locks; K1 Key Blank