SpecificationsType: Allen Wrench Drill Bit SetMaterial: High Quality S2 Alloy SteelSurface Treatment: SandblastingType of Head: Hex HeadLength: 2 inch (50mm)Hex Shank Diameter: 1/4 inch (6.35mm)Set of 10 sizes: H1.5/H2/H2.5/H3/H3.5/H4/H5/H6/H7/H8 (A variety of sizes to meet all your requirements; the mini size makes it easy to carry or store anywhere) Industrial-grade Material:These hex bits made of high quality S2 alloy steel with a special heat treatment process, increased torque and unmatched hardness.The black phosphate treatment on the surface of the drill bit can effectively prevent it from being corroded and rusted. Widely Used:Each edge can accurately lock the screw without damaging the screw and screwdriver bit.
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