Opens with your vehicles ignition key eliminating extra keys on your ring; Works with early model Chevy, GMC, Buick & Cadillac keys;Stainless Steel 5/8 diameter pin for use with Class 3, 4, and 5 hitches (2 to 2.5 Receiver);Auto-Return spring locks automatically when key is removed;Stainless steel lock shutter to keep out dirt and moisture, plate tumbler sidebar to prevent picking and bumping, double ball bearing locking mechanism;Limited Lifetime Warranty

• BOLT 7018445 5/8 Receiver Lock for early model Buick, Cadillac, Chevrolet, GMC, Hummer, Oldsmobile and Pontiac Keys

BOLT 7018445 5/8 Receiver Lock for early model Buick, Cadillac, Chevrolet, GMC, Hummer, Oldsmobile and Pontiac KeysBOLT