Check the listing for details. 1/2-Inch Drive 19mm 12-Point Deep Impact Socket CR-MO Steel DIY hand-making. Condition: New. Listed at 16.11 USD. Deep Impact Socket CR-MO SteelWhy Choose This:★【Size】1/2" square drive, 19mm 12-point socket, 78mm (3") total length.★【Pin Hole】Individual pinhole base design adds extra security by placing in a locking pin for stability when exerting strong torque motion,.★【Design】Radiused corners prevent fastener wear and increase the torque on fasteners by placing force on fastener's flat sides, rather than fastener corners.★【CR-MO Steel】Forged with chrome-molybdenum steel provides excellent durability and strength with every impact movement; black phosphate finish for extra protection against rust and corrosion.★【Widely Use】For disassembly and tightening of double hex (12-sided), hex and square head bolts and nuts, especially suitable for requiring large torque and narrow space.