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 8mm Magnetic Deep Drive End 19mm Socket End 14mm Bolt Clearance Depth 43mm Hex Depth 4mm Length 55mm Lifetime Warranty