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. Sizes Include - SAE 6-32nc, 8-32nc, 10-24nc, 10-32nc, 12-24nc, 1/4-20NC, Metric M3 x 0.5, M4 x 0.7, M5 x 0.8, M6 x 1, M8 x 1.25, M10 x 1.5, quick change adapter. B09KTJH7GD