clearance M4 HSS 1/4 Hex Shank Drill & Tap Taper Drill Bits Power Tool Part

1、High hardness anti?rust strong and durable suitable for drilling tapping and cutting of soft metals aluminum plates iron etc. 2、Self?centering point no need for auxiliary center drilling or center punching. 3、Drilling and tapping integrated one?step processing greatly saves processing steps and time costs and improves work efficiency. 4、This tap drill set has a unique design at the same time drilling tapping and chamfering. 5、Accurate ground point flutes body clearance and drill diameters for the best accuracy and performance.