【High Speed Steel & Titanium Coating】These taps are made of high speed steel, with precision ground tap sets with nitrided surface for high hardness and rust resistance to meet high requirements for process reliability and tool life. 【Three-in-one Function】It can help you complete tasks such as drilling, tapping, and chamfering on a single drill, which greatly saves processing steps and time costs and improves work efficiency. 【Spiral Taper Design】The self-tapping screw adopts a helical groove design, and the helical taper design can prevent thread damage caused by excessive drilling, and the chip area method will be better. Self-centering point, no auxiliary center drilling or center punching required. 【Package Includes】6 pieces titanium taps (M3, M4, M5, M6, M8, M10) for tapping various threads. Note: Each time you drill a hole, water must be injected to cool the drill bit at the same time. If the drill bit cannot be cooled during drilling, the drilling speed should not be too fast