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Master Lock Universal Trailer Coupler Lock


  • Deters trailer theft by fitting over the coupler, preventing hookup
    • Designed for use when trailer is not in tow
  • Constructed with a laminated, riveted steel frame for strength and durability
    • Center section that fits inside coupler is finned steel - will not warp or bend
  • Fits most 1-7/8", 2" and 2-5/16" ball couplers, including:
    • Straight lip, rolled lip and surge brake/hydraulic couplers
    • Reese, Fulton, Valley, Atwood, Shelby, Putnam, Bulldog, Dutton-Lainson and UFP couplers
  • Boasts integrated, weather-resistant cover that keeps dirt and moisture out of keyway
  • Includes 2 keys
  • Limited lifetime warranty


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