7 Pcs 1/4" Hss Spiral Hex Shank Combination Drill Screw Tap Bit Set (M3-M10) with Automatic Spring Loaded Center Punch Tool, Tap Drill Bits Threading Drill Bit Threading Bit Tool.
Material: HSS (4341) High hardness, rustproof, solid and durable; Self-centering design: do not need additional center drilling or center punching
Metric: M3x0.5, M4x0.7, M5x0.8, M6x1, M8x1.25, M10x1.5.Shank:1/4 inch (6.35mm) hex shank
Fast replacement composite cone, uses drill edged principle. Drilling and tapping in one, one-step processing, greatly save processing steps and time costs, improve working efficiency.
The Automatic Center Punch delivering an automatic spring-driven strike when pressed against surface, it can be adjusted cap regulates striking force
Widely Use: Suitable for drilling, tapping, cutting on soft metal, aluminum plate, iron, etc. Note:Low Speed and Cutting holes in materials (Thickness: <3mm)