Swivel Head allows for access to keyway in tight spots. No key required to lock - featuring the new Push to Lock Technology. Chrome plated for improved wear and corrosion resistance. Solid brass lock cylinder and cylinder case offer extreme corrosion resistance. Advanced hardened receiver pins for increased sheer strength. Limited Lifetime Warranty. No key required to lock - featuring the new Push to Lock Technology. This chrome plated lock protects from theft when securing the ball mount to the receiver. Fits 5/8" & 1/2" diameter receiver holes. The straight portion of the shaft's length is exactly 2-7/8" long. This chrome plated lock protects from theft when securing the ball mount to the receiver. The lock comes with two pins, fitting 5/8" & 1/2" diameter receiver holes. 5/8" diameter pin fits 2" receiver tubes, Class III / IV, 10,000 lb. load rating. 1/2" diameter pin fits 1-1/4" receiver tubes, Class II, 5,000 lb. load rating.