The lug nuts become distorted due to improper leverage using the factory supplied tire iron. Removing over-torqued lug nuts during extreme cold/heat also distorts lug nut cap to non standard sizes. Use these dedicated sockets every time you loosen the Locking Wheel nut and remove damaged/distorted lug nuts with their versatile size range ideal for worn and distorted nuts. Dual flip 1/2'' drive impact socket design. Product classed as Consumable. Supplied in EPA Foam Tray.