Master Lock 387 Trailer Coupler Lock King Pin Lock for Semi-Trailers, RV and Fifth Wheel Trailer

The Master Lock No. 387 High Security King Pin Lock secures the king pin of semi-trailers, RVs and other fifth wheel trailers to prevent theft and deter break-in’s. Including an integrated padlock (No. 5), this locking device renders bolt cutters useless and the high-grade aluminum is lightweight while providing high security.