The 6 piece double flip socket set is designed to easily remove damaged lug nut, using the 6 fluted twist socket end. Flip socket to other end and use a traditional 6 point to remove and install lug nuts. A 1/2in Dr. 3in extension bar is recommended to use during operation. Standard 6 Point and 6 fluted twist flip socket design. 6 fluted twist end is designed to remove damaged lug nuts. Made from Chrome molybdenum steel for strength and durability. Black oxide coating resists corrosion. 1/2in Dr. 3in Extension Bar included.