Material; The electric drill key adopts zinc alloy high hardness torsion bar, which can bear more resistance, stronger force and durable.
Special process; the surface of the electric drill chuck is black-plated, deeply rust-proof, the surface is smooth and polished, dense and wear-resistant, the chuck key is universal, the center hole can be threaded, it is easy to carry and use, and it is suitable for most chucks.
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