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6PCS HSS Drill Bit Set, Combination Drill and Tap Set with Anti-Rust Black Coating M3 M4 M5 M6 M8 M10 Metric Thread 1/4”hex Shank Screw Tapping Threading Tools Metal Drill Bits for Hard Steel

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  • Industry-grade HSS construction: These drill and tap bits are crafted from high-speed steel with titanium coating, offer superior hardness and rust resistance, ensuring long-lasting sharpness even when drilling through hardened steel, aluminum, and alloys Spiral flute design for efficient chip removal: This HSS drill bit set with the twisted spiral flutes prevent chip clogging during tapping, allowing smooth, effortless threading while maintaining consistent thread quality in deep or confined spaces Universal 1/4" hex shank compatibility: This tap and die set is designed to fit most hand drills, drill presses, and tapping machines, the standard 1/4" hex shank ensures secure gripping and reduced slippage during high-torque applications Complete threading solution: This 6-piece drill bit set covers the most common metric sizes (M3-M10), with precise pitch specifications for clean, accurate threads in both blind and through holes—ideal for mechanical repairs and fabrication projects Dual-purpose drill and tap function: Each hss drill bit drills and threads in one step, saving time and effort on metalworking, automotive, and DIY projects.
  • The black oxide finish further enhances durability and corrosion resistance

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