10pcs Hex Shank Screw Tap Drill Bit, Coated HSS Tapping Tool with Spiral Flute for Blind Hole, Metric Coarse Thread M3 - M10, for Power Drill and Bench Drill (M3-2.5 (6 Square Handle Coated))

Item Type: Hex Shank Screw Tap Drill BitMaterial: High Speed SteelOpening Type: Blind HoleTap : Spiral FluteThread Type: Coarse ThreadType: Machine TapAccuracy: H2Options: M3-2.5, M4-3.3, M5-4.2, M6-5, M8-6.8, M10-8.5Package List：10 x Screw Tap Drill BitNote:Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.

• 2-in-1 Drilling and Tapping Function: This hex shank screw tap drill bit combines a drill bit and a screw tap in one tool, enabling you to drill and tap threads in a single step. The -coated HSS construction delivers high efficiency and smooth performance on harder materials like steel and stainless steel, saving time and effort during DIY or professional metalworking projects.
• Spiral Flute Design for Efficient Chip Removal: Featuring a spiral flute structure, this tapping tool effectively pulls chips upward and out of blind holes, preventing clogging and ensuring clean, precise threading. This design significantly reduces the risk of tap breakage and improves overall thread quality during repeated use in tight or deep holes.
• Wide Compatibility and Practical Use: Ideal for machinists, automotive technicians, and home workshop users, this metric screw tap drill bit set covers common coarse thread sizes from M3 to M10. It works seamlessly with power drills, bench drills, or any tool with a 1/4-inch hex chuck, making it perfect for repairs, fabrication, and assembly tasks across various industries.
• High-Speed Steel with Nitrided Surface: Made from premium high-speed steel (HSS) and treated with nitriding for enhanced surface hardness and rust resistance, each screw tap drill bit maintains sharpness and durability even under heavy-duty use. The coating further boosts wear resistance and extends tool life without compromising cutting precision.
• Complete 10-Piece Set with Standard Sizes: The package includes 10 hex shank screw tap drill bits in essential metric coarse thread sizes: M3-2.5, M4-3.3, M5-4.2, M6-5, M8-6.8, and M10-8.5 (note: exact distribution may vary between new and old types). This ready-to-use set ensures you have the right size for most standard threading applications in metal, plastic, or composite materials.