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  5. Video 11651

Master Lock Trailer Coupler Locks - Surround Lock - 378DAT Review Video

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Employee Jeff D
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Employee Matthew K
Installed by:
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Employee Alan C
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Employee Chad S
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Products Featured in this Video


Master Lock 2-5/16" Trailer Coupler Lock


Master Lock Trailer Tongue Lock

66 reviews


Code: 378DAT

Price:  $58.42
  • Trailer Tongue Lock
  • Surround Lock
  • Universal Application Lock
  • Keyed Unique
  • Fits 2-5/16 Inch Ball
  • Master Lock



Trailer coupler lock guards against trailer towaway theft.


Do you have a question about part 378DAT?more information >     


Review of Master Lock Locks 378DAT


Today we're going to review part number 378DAT. This is the Master Lock 2-5/16 trailer coupler lock. This coupler lock will guard against trailer tow-away theft. It will fit the 2-5/16 size ball diameter couplers and it fits following brands: The Atwood, the Reese, the Fulton, Shelby, Valley, Dutton-Lainson, Putnam, Acme, Ideal. It will not fit any of the flat-nose style couplers. It does… see more >