How To Use the master lock 2 5/16 Inch trailer coupler lock
Autos, Motorcycles & Planes • Driving & Safety
See how to use a master lock 2 5/16 inch trailer coupler lock. The video starts off by showing you the actual locking mechanism itself. It has three positions, one obviously has a lock position, the second is the unlock position and the middle position here is the ratchet position.