King Pin Lock, Lock Type King Pin Lock, For Use With King Pins, Hole Diameter 2 15/16 in, Vehicle Class VII, VIII, IX, Features Keyed Differently, Open Base Design, Prevents Theft of Semi-Trailers and Fifth Wheel Campers, Unique Bell Shape, Withstands Illegal Coupling Attempts, Includes (2) Keys, Lock, Tie Strap, Yellow Flag, Finish Powder Coated