? Grey Pneumatic sockets are designed for professional tool users. ? Made of high quality alloy steel. ? Engineered specifically for use with impact tools. ? Benefits of the GP Impact Socket ?High Torque? drive: Increased strength, easier access to tight areas, and reduced wear. ? 6-Point ? 3/8? Drive ? 14mm Magnetic Deep ? Drive End 22mm ? Socket End 21.5mm ? Bolt Clearance Depth 43mm ? Hex Depth 6mm ? Length 55mm ? Lifetime Warranty