Master Lock 3784DAT Heavy Duty Trailer Coupler Lock

  • List Price: $63.56
  • Sale Price: $37.61
  • Amount Saved: $25.95
  • Availability: Usually ships in 24 hours


  • Heavy duty trailer coupler lock fits 2-5/16 inch couplers
  • Laminated steel construction
  • Advanced locking mechanism resists against picking and prying
  • Keyway cover protects lock from moisture and dirt
  • Keyed alike stainless steel adjustable trailer coupler latch lock is included with the coupler lock

Product Description

Protect your trailer from tow away theft with this coupler lock set from Master Lock. This heavy duty trailer coupler lock fits 2-5/16 inch standard lip, rolled lip, straight lip, surge brake, hammer blow and UFP coupler styles. Laminated steel construction protects against physical attacks while an advanced locking mechanism resists picking and prying. A stainless steel coupler latch lock is keyed alike with the coupler lock for added security and convenience. The latch lock adjusts from 9/16 inch to 2-3/4 inch for application versatility. A keyway cover protects both lock cylinders from moisture and dirt.

Product Detail

  • Product Dimensions: 9 x 12 x 5 inches; 3.9 pounds
  • Shipping Weight: 3.9 pounds
  • ASIN: B004A5LCMQ
  • Item model number: 3784DAT
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