Material: high speed steel. Ground straight tap set with step and 1/4 hex drive, HSS for M3, M4, M5, M6, M8, M10 for high demands on process reliability and tool life./ High hardness, rapid exchange of composite membrane, uses sharp drilling principle. One-step drilling and tapping Strong processing steps and time saving improve work efficiency. Spiral taper design prevents thread damage from over-drilling. Same center point, no center drilling or punching required. The design allows for drilling, tapping, deburring and countersinking in wood, plastic, thin aluminium, copper and other soft metals (5-6 mm), not for hard materials (eg sheet metal). steel). Package Contents: 6 taps (M3, M4, M5, M6, M8, M10). Noticed : When drilling a hole, it is necessary to inject water at the same time to cool the drill. This will help you increase the value of the drill. If you cannot cool the bit while drilling holes, the drilling speed should not be too high, and you should not drill too often. Name: White diamond/titanium plated metric hex shank composite tap Application: three in one (punching---tapping---one-time deburring Material: high-speed steel / Specifications: M3*0.5, M4*0.7, M5*0.8, M6*1, M8*1.25, M10*1.5 It is suitable for processing soft metals (such as aluminum alloys, zinc alloys, tin alloys), thin boards and plastics with a thickness of less than 5 mm.Steel materials are not suitable, easy to break Number number of pieces delivered: set of 6 piecesNote: the data are all measured manually, please allow 1-3cm error, due to the difference in light and display, there will be a certain color difference, the actual object received shall prevail.