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, increased torque, easier access to tight areas, and reduced wear. 6-Point 1? Drive 32mm Deep Drive End 51mm Socket End 51mm Bolt Clearance Depth 60mm Hex Depth 32mm Length 90mm Lifetime Warranty