13PCS titanium coated SAE and metric tapping drill bit kit with threaded drilling, tapping, deburring, and countersunk heads

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High Quality Material - High speed steel provide good wear resistance and cutting performance. Titanium coating provide longer bit life by resisting heat buildup. Widely Application - Taps suitable for drilling, tapping, deburring on wood, plastic, iron, aluminum, copper, soft metal, etc. High Efficiency - 1/4 inch hex shank fit into most power tools, such as electric drill, bench drill, drill press and Tapping machine. Self-centering Design - Self-centering point, do not need assistant center drilling or center punching. 【High Quality Materials】Titanium Combination Drill tap bits are made of high speed steel, which can ensure sharp, fast execution and retain strength and efficiency. The surface is treated with a titanium alloy, which greatly improves the cutting performance of the drill, is more wear-resistant and prolongs the service life. 【Unique Design】The product portfolio includes SAE and metric sizes, so it has high versatility. Each tap drill is engraved with a label, which is convenient for you to choose the size that suits you. The convenient ¼-inch (6.35mm) hex shank has a tapered end to prevent excessive knocks. Back taper exceeds the tap to prevent over-drilling and damage to the thread.