Sidchrome SCMT14439 1/2 Inch Drive 12-Point Impact Socket feature the powerdrive fastening system, delivering up to 20 percent more torque to the fastener. Powerdrive impact sockets are ideal for stubborn fasteners and also reduce the risk of fastener rounding. The powerdrive design allows the socket to contact the fastener away from the corner while also dispersing the stress over a larger area. When you work with ABW impact sockets, you are working with premium tools designed to give you the professional advantage. ABW Sockets are designed, manufactured and tested to the highest specifications, to ensure unequalled quality. All impact sockets are made according to relevant American Federal specifications GGC-W-600A, ANSI and DIN standards 3121 and 3129. Size: 1-1/4 Inch Diameter.