DEWIN Thread Tap Drill Bit Set, 6 Pcs Tile and Metric M3 M10 Titanium Coated HSS Bits 1/4" Hex Shank Hand Tools

【High Speed Steel and Titanium Coating】: Thread tap drill bits set are made of high speed steel, precision ground tap sets with a nitrided surface for high hardness and rust resistance to meet high demands on process reliability and tool life . 【Three-in-one function】: Thread taps can help you complete tasks such as drilling, tapping and chamfering on one drill, which greatly saves processing steps and time costs, and improves work efficiency. 【Spiral taper design】: The self-tapping screw adopts 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 titanium drill taps (M3, M4, M5, M6, M8, M10) for tapping various threads. Note: Every time you drill a hole, water should be injected to cool the drill bit at the same time. If the drill cannot be cooled while drilling, the drilling speed should not be too fast nor too frequent. 【High compatibility】: Drill bit sets can drill, thread, deburr and countersink on wood, plastic, thin aluminum, copper and other soft metals (5-6mm), not suitable for hard materials.