HASTHIP HSS Spiral Hex Shank Combination Drill Screw Tap Bit Set - 7 Pcs HSS

Highlights: - 6PCS 1/4" Hex HSS Composite Spiral Screw Tap Drill Thread M3-M10 with Automatic Center Punch Tool Specification: Material: High-speed steel(HSS 4341) Color: Silver Metric: M3x0.5, M4x0.7, M5x0.8, M6x1, M8x1.25, M10x1.5 Shank: 1/4" (6.35mm) hex shank Size: M3, M4, M5, M6, M8, M10 Center punch material: iron, high-speed steel punch head, brass protective coating Center punch size: 13 cm/ 5 inch in length, 1.27 cm/ 0.5 inch in diameter Usage: Suitable for drilling, tapping, cutting on soft metal, aluminum plate, iron, etc. Description : - 1.High hardness, rustproof, solid and durable. - 2.The advantage is opening, tapping, chamfering. - 3.Self-centering point, do not need assistant center drilling or center punching. - 4.Drilling and tapping in one, one-step processing, greatly save processing steps and time costs, improve working efficiency. Features : - 1. Save processing steps and time costs, improve efficiency - 2. Spiral groove, within the processing thread, cutting up to exclude, and was curled applied internally threaded through holes Package include: - 6 x Compound Tap Drill Bits - 1 x Automatic Center Punch Tool - Caution: When you use this drill bits, the material temperature will get very high, please add some water or coolant to avoid the material get smoke when using it.