Sidchrome 1/2-Inch Long Drive 10-Piece Set/Tray Sockets feature the PowerDrive fastening system, delivering up to 20% more torque to the fastener. Ideal for stubborn fasteners and also reduce the risk of fastener rounding. 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".