Set includes one 5/8in. diameter hitch lock for Class 3 and 4 receiver-style hitches and one trailer coupler lock with 1/4in. diameter pin and 1/2in. span. Keyed alike. From the manufacturers of the original Deadbolt lock for hitches and trailers. Locks are double nickel chrome-plated for maximum corrosion protection. Features a patented, rugged, pick-proof screw-and-lock mechanism for total security. Easy key insertion and removal. Covered key opening and nonslip pin grip. U.S.A. 1-year limited warranty.