The drill bit extension is made of a triple quality material combination of chrome vanadium steel, aluminum alloy, and carbon steel, which has excellent high strength and wear resistance. It is not easy to bend or break when subjected to the torque of tightening screws. The aluminum alloy material wrapped around the outer layer not only significantly reduces the overall weight of the tool, but also has good corrosion resistance.The socket is made of carbon steel, which has high hardness and good toughness, and can tightly bite the batch head, avoiding slipping and wear during high-speed rotation or high torque.The surface is treated with multiple processes of oxidation, and chrome plating, comprehensively enhancing the product's protective performance and appearance texture.
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