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Hex Head Screwdriver Bit Set Comes with 7pcs metric Allen wrench drill bits H1.5/H2/H2.5/H3/H4/H5/H6 can meet your different needs. Shank 1/4 inch hex shank, Length 2 inch (50 mm)

Material 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

High Precision Adopting CNC precision processing technology to ensure the accuracy of the product. The drill bits can withstand the instant impact of large torque pneumatic tools, greatly improving the service life

Strong Magnetic Strengthened magnetic impact hex bits set helps you suck the screw easily and quickly. The magnetic force will not decay after multiple uses, which can improve your work efficiency

Allen Wrench Drill Bit Set The 1/4 inch hex shank makes it much easier to fit into power tools, especially for quick change chuck. Fit for electric screwdriver, hand screwdriver, electric drills and air drills