21mm Lug Nut Remover, Wheel Lock Removal Kit for Stripped Bolt & Rounded Nut, 1/2" DriveStyle: 21MMConstructed from high hardness chrome-molybdenum steel and coated with black phosphate for enhanced durability. The reverse twist socket provides maximum torque, making it easy to remove stripped, rusted, rounded, and damaged bolts and lug nuts. Features a standard 1/2-inch drive square head compatible with ratchets, breaker bars, impact wrenches, and various hand or power tools. Dimensions: 1.97 x 1.18 x 1.18 inches.