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Master #387 High Security King Pin Lock


  • Built to secure the king pin of semi tractor trailers, it also works on travel trailer king pins.
  • Bolt cutters are useless against this lock.
  • High grade aluminum is lightweight while providing high security.
  • Includes an integrated #5 lock.
  • Bright red color to remind you it is there and warn off thieves.

MSRP = $142.32

The Master 387 is the "Big Daddy" of king pin locks, weighing in at nearly 7 pounds. The 387 kingpin lock has a heavy body and a large laminated padlock built right in.

These locks can also be special ordered in keyed-alike sets. Drop us an email if you are interested.

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  • Model: MA-387
  • Shipping Weight: 7lbs
  • Manufactured by: Master Lock

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