� Includes a removable, extra-thin carbon fiber protective sleeve to safeguard wheel finishes from damage � The innovative extra-thin carbon fiber sleeve enhances socket durability, allowing for a thicker overall socket design that resists cracking at hex points under extreme impact torque � Designed with a finger-width divot for easier installation and removal compared to standard impact lug nut sockets � Use with �-inch square drive tools � Size: 21mm � Red color-coded for quick identification � Other sizes available: 17mm (Blue), 19mm (Yellow), and 22mm (Green)