Features Proto® 12 Point 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. Size / 7/8 inch Nut end outside diameter / 1-3/16 inch Nut depth / 41/64 in Blot clearance depth / 7/8 in Overall length / 1-5/16 in Weight / 0.24 lbs Drive size / 3/8 in Point size / 12 Finish / Full Polish Length type / Standard Unit of measure / Fractional Specification ASME / ASME B107.110-2012 Specification AS / SAE AS4984A