Ten of the most popular Fractional and metric impact socket sizes for truck wheel fasteners Made of high quality alloy steel (chrome-molybdenum)Tested to the highest specifications to deliver outstanding performance at the competitive cost Packaged in a molded storage case Lifetime Warranty Grey Pneumatic sockets are designed for professional tool users. They are engineered specifically for use with impact tools using the most up to date industrial specifications.This features our "high torque" drive. This limits the amount of wear on the corners of the fastener and the socket. It also improves the strength of the socket, transfers increased torque to the fastener and allows easier access to tight areas. Set contains the following: 6-Point sizes include: 1-1/16', 1-1/8' and 1-1/4' Thin Wall Deep; 1-1/2' Deep Budd; 33mm, 35mm and 41mm Deep. 4-Point sizes include: 13/16', 17mm and 21mm square.