Master #377 Universal Coupler Lock

Fits many 1-7/8" and 2" couplers.
Adjusts to fit many makes and models.
Will NOT fit couplers that do not have a lip, such as Bulldog^® couplers.
Each lock comes with 2 keys.

MSRP = $53.00 / $44.17 for KA

The Master 377 has been a mainstay of the Master trailer coupler lock line for years and is still a popular choice. Just be sure your trailer coupler has a lip for it to lock over. ie. The Master 377 lock WILL NOT work on Bulldog couplers.

Uses a Master K1 Key. Master Lock no longer offers this lock in keyed-alike. Sorry. .
Master K1 Keyway