, Receiver Lock Trailer Coupler Latch Lock, Coupler Lock Fits 178 48 mm, 2 51 mm Most 2516 59 mm Couplers, Receiver Lock Includes The Push To Lock Locking Mechanism, Easily Used By Pushing The Lock Body Firmly Onto The Pin Removing The Key, Fits Both 12 13 mm 58 16 mm Receivers, Latch Lock Adjusts From 916 14 mm To 23 70 mm For Added Application Flexibility, Keyed Alike, Coupler Lock Fits 178 48 mm, 2 51 mm Most 2516 59 mm Couplers, Push To Lock Receiver Lock Fits Both 12 13 mm 58 16 mm Receivers, Latch Lock Fits Most Couplers Is Adjustable With 6 Locking Positions From 916 14 mm To 234 70 mm