Apex Tool Group 243840 Master Mechanic 0.5 in. Drive x 21 mm 6 Point Deep Impact Socket Master Mechanic 1/2″ Drive Deep Impact Sockets are manufactured from chrome vanadium steel. The 6-point design helps reduce risk of slippage and rounding off your fasteners. Corrosion resistant black phosphate finish. Socket Size: 21 mm Drive Size: 1/2″ Points: 6-Point Deep impact socket Chrome vanadium steel construction Corrosion resistant black phosphate finish. Features Socket Size: 21 mmDrive Size: 1/2″Points: 6-PointDeep impact socketChrome vanadium steel construction USA SHIPPING eBay estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.