Made from Chrome plated machine-hardened steel 1 receiver locking pin for 2" and 2-1/2" receivers. (HOLLOW SHANK ONLY) 3-5/8" x 5/8" inside shank, 30,000 lbs shear strength, Push button locking system‚ Keyed alike. Rubber Dust cap shields key slot from liquids and other grime‚ Provide 24/7 security for your hitch mounted accessories For 2011 and newer Chevrolet and GMC use pin #3428 for the reciver pin.