[Size] - 1/2" square drive socket, 5/16 hex bit, 3.07-inch (78mm) total length.. [Torque Strength] - Chrome-molybdenum steel has excellent durability and strength with every impact movement; black phosphate coating for extra protection against rust and corrosion.. [Chamfered Design] - Chamfered ends insert smoothly into fastener head, reducing wear.. [Pin Hole] - Individual pinhole base design adds extra security by placing in a locking pin for stability when exerting strong torque motion.. [Widely Used] - Use with a ratchet to increase the speed of tightening square drive fasteners. And the product has no insulation properties and is not suitable for electrical environments..
