[Size] - 3/8 inch square drive socket, H3 (3mm) hex bit, 1.5 inch (38mm) total length.. [Durable] - Quenched and heat treated S2 alloy steel bits, high hardness, reduce wear-outs. High strength chrome vanadium steel sockets, increase turning power.. [Torque Strength] - Complete corrosion resistance and rust resistance, mirror-polished and nickel-plated sockets and phosphate bits finish.. [Precision Bits] - Automatically process bit tips to ensure accurate size, chamfered ends insert smoothly into fastener head, reducing wear.. [Great Tools] - Use with ratchet to improve speed in tightening hex drive fasteners. And the product has no insulation properties and is not suitable for electrical environments..
