Features BETTER CHIP REMOVAL EFFECT: The tap adopt spiral groove design, the chip removal effect is better, more efficient DURABLE AND CORROSION RESISTANT: Combined tap drill come with Ti plated and blue plated surface, durable and corrosion resistant SAVING TIME AND EFFORT: Drilling and tapping are carried out at the same time, saving time and effort, very practical HIGH HARDNESS AND LONG LIFE: Adopt high speed steel material, possess high hardness and long life. With 1/4in hex shank diameter FOR DRILLING, TAPPING AND CUTTING: Suitable for drilling, tapping and cutting of soft metals, aluminum plates, iron, etc. Specification: Item Type: Combined Tap Drill Material: High speed steel Surface Treatment: Metric System: Surface Blue Treatment, Imperial System: Surface Ti treatment Metric Specifications: M3x0.5, M4x0.7, M5x0.8, M6x1, M8x1.25, M10x1.5 Imperial Specifications: 1/4-20NC, 12-24NC, 10-24NC, 10-32NC, 8-32NC, 6-32NC Hex Handle Diameter: 1/4in Package List:12 x Combined Tap Drill1 x Plastic Case Note:Confirm the appropriate size before use, and do a good job of safety protection during use. Package List 12 x Combined Tap Drill 1 x Plastic Case