Specification - 10Pcs allen wrench screwdriver bits H4, 1/4 inch Hex shank, 4mm / 0.16inch hex head size, 75mm/3inch long.
Material - Hex head drill bit made of sturdy S2 steel, hex head bit have proper hardness and torsion, not easy to break and wear.
Magnetizable hex drill bits - The weak magnetic screwdriver bit can be magnetized with magnet or strong magnetic bits.
Easy to Use - Hex screwdriver bit have magnetic, it can be firmly fixed on screwdrivers and keep hexagon screws stuck to them, can improve your work efficiency.
Multi Purpose - Allen screwdriver bit fit for electric screwdrivers,hand screwdrivers, electric drills, air drills, cordless drills, impact drivers and so forth.
