The Master Lock No. 388 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. 25), this locking device renders bolt cutters useless and the high-grade aluminum is lightweight while providing high security.

Product Features

• Secures the king pin of semi-trailers, RVs and other fifth wheel trailers
• Renders bolt cutters useless
• High grade aluminum is lightweight while providing high security
• High visibility red body and durable flag alert drivers that lock is attached
• Includes an integrated No. 25 lock with all of its security and keying flexibility

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