Proto 6 point impact sockets are ideal for use on stubborn or damaged fasteners, and also on fasteners made from soft materials. The torque plus design is a high performance drive configuration which allows for quick and easy socket engagement to the fastener flats, not the corners. The torque plus configuration employs a radius-corner design, shifting contact area and stress away from the fastener corners and distributing contact stresses. Socket size stamped on tool for easy identification.