Stanley J6520H Proto 1/4-inch Drive Deep Impact Socket 5/8-inch - 6 Point Proto 6 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 to the fastener flats, not the corners. The TorquePlus configuration employs a radius-corner design, shifting contact area and stress away from the fastener corners and distributing contact stresses over a large area of the socket, minimizing slippage. The TorquePlus internal design minimizes fastener rounding, helps to extend fastener life and allows the user to more easily turn worn, rounded, or rusted fasteners. Socket size stamped on tool for easy identification. Side locking hole. 1/4-inch Drive Deep Impact Sockets - 6 Point TorquePlus features apply, Socket size stamped on tool for easy identification, Side locking hole. 5/8-inch Size.