One of a comprehensive range of Premier Hand Tools, suitable for daily professional use. Chrome Vanadium, drop-forged, deep WallDrive impact socket. Hardened and tempered for added strength, with a phosphate finish for greater corrosion resistance. Ideal for use with air impact wrenches. Lifetime guarantee*. Depth: Deep Drive: 1/2″Sq Material: Chrome Vanadium Nett Weight: 0.25kg Size: 21mm