"Trailer coupler lock has 1/4in. diameter pin and 2in. span. From the manufacturers of the original Deadbolt lock for hitches and trailers. Lock is 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. Length in. 2, Includes qty. 1, Diameter in. 1/4, Keys Included qty. 2, Material Double nickel chrome plated, Type of Lock Trailer coupler. Removing the lock when not engaged in towing or security is recommended for longer life Lubricating lock with a penetrating oil is recommended to flush out any water or debris and to prevent rust"
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