Exclusive "Quick-Lock" ball clamp assembly that can be adjusted without the need of wrenches, providing a precise fit on the hitch ball for proper towing. The trigger action release on the ball clamp assembly allows fast locking and unlocking of the ball clamp for convenient hitching. The safety lever snaps shut and cannot unlatch by itself. D-L coupler balls are made from precision machined solid, cold drawn steel. TUFFPLATEA(R) zinc finish. Quick Lock Coupler 2" Exclusive "Quick-Lock" ball clamp assembly that can be adjusted without the need of wrenches, providing a precise fit on the hitch ball for proper towing. The trigger action release on the ball clamp assembly allows fast locking and unlocking of the ball clamp for convenient hitching. The safety lever snaps shut and cannot unlatch by itself. D-L coupler balls are made from precision machined solid, cold drawn steel.