McGard easy to use, one piece wheel lock functions like a regular lug nut. Its design allows for an unlimited number of different computer generated lock and key patterns. McGard locks are made to meet or exceed OEM standards for safety and durability.  Wheel Lock Design Allows For An Unlimited Number Of Different Computer Generated Lock And Key Patterns Manufactured In The USA To Meet The Highest OEM Standards For Safety And Durability Extra Narrow Groove Patterns Triple Nickel Chrome Plating Precise Bearing Surface For Concentricity Of Bearing Surface To The Pitch Diameter Is 30 Percent More Precise Than OEM Standards Limited 1 Year Warranty