1/2" Drive x 21mm Extra-Thin Wall Deep 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. 1/2” Drive. 21mm Extra–Thin Wall Deep. Drive End 1.10mm. Socket End 1.10mm. Bolt Clearance Depth 1.58mm. Hex Depth 0.95mm. Length 3.07mm. Extra–Thin Wall Impact Sockets are not covered by the Gp Warranty. 2021MDT No -