Master Lock Premium Die-Cast Dual Purpose Coupler Lock.

Master Lock Premium Die-Cast Dual Purpose Coupler Lock.

Master Lock 377DAT Trailer Coupler Lock

• Fits 1-7/8" & 2" couplers.
• Adjusts to fit many makes and models.
• Uses number 1 key blank.
• Available keyed alike or keyed differently.
• 2 keys included.