Sealey IS3421 Impact Socket 21mm 3/4"Sq Drive Chrome Molybdenum, drop-forged, WallDrive® impact socket. Hardened and tempered for added strength, with phosphate finish for greater corrosion resistance. Ideal for use with air impact wrenches. IS3421 Features One of a comprehensive range of Premier Hand Tools, suitable for daily professional use Chrome Molybdenum, drop-forged, 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* IS3421 Specification Model No IS3421 Brand: Premier Depth: Standard Drive: 3/4"Sq Material: Chrome Molybdenum Nett Weight: 0.34kg Size: 21mm What is included: 1 x Sealey IS3421 Impact Socket 21mm 3/4"Sq Drive