【HSS Meterial】The combination drill tap bits are made of high quality High-Speed Steel with titanium coating, strong hardness and good durability. which greatly improves the cutting performance of the drill, more wear-resistant and long service life ✅【High Efficiency】Taps are designed with spiral flutes, spiral tap the crumbs into a spiral up chip evacuation, it is more suitable for the processing of blind holes and sticky materials processing ✅【High Versatility】Set of 6 drill tap bits in metric sizes M3x0.5 M4x0.7 M5x0.8 M6x1 M8x1.25 M10x1.5, with 1/4inch hex quick-change shank, fit Electric hand drill, impact drill, bench drill,tap machines ✅【Handy Tools】Three in operation provides hole drilling, tapping, deburring and countersinking for a quick and complete job on copper, brass, aluminum, sheet metal and plastic. Used to drill a hole and cut new threads at the same time, you will have a smooth tapping experience with them, greatly save processing steps and time costs, improve working efficiency ✅【Wide Applicable】These drill tap bits are must have if you fabricate a lot, they’re sharp, and easy to use, suitable for drilling tapping cutting on light metal aluminum board, iron plate, ordinary stainless steel and other hard materials