GM Accessories 17802466 M14x1.5x49.9 Steel Locking Lug Nuts in Chrome with Key (Pack of 4) Steel collar design guides the key into the lock pattern and holds it in alignment for easy installation and removal Computer generated key design allows for an infinite number of key patterns Extra narrow groove pattern resists the intrusion of lock removal tools Through-hardened and tempered steel construction for increased depth of hardness and security Core integrity and precision machining for increased strength