Stanley Proto J7420 1/2-Inch Drive Impact Socket, 5/8-Inch, 12 Point Proto 12 Point Impact Sockets are ideal for use on stubborn or damaged fasteners and also on fasteners made from soft materials The TorquePlus design is a high performance drive configuration which allows for quick and easy socket engagement The TorquePlus configuration employs a radius-corner design, shifting contact area and stress away from the fastener corners The TorquePlus internal design minimizes fastener rounding, helps to extend fastener life