Stanley Proto J7430MT 1/2-Inch Drive Impact Socket, 30mm, 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 Side locking hole