10Pcs Spiral Tap Drill Bit Set, M4x3.3 Titanium Coated HSS Screw Tapping Drill Bits Kit, 3.3mm Spiral Screw Tap Set Hex Shank Tapping Hand Tools

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  • 6542 HSS MATERIAL The M4 screw tap drill bit is made of 6542 HSS high speed steel material, higher hardness and more
  • PRACTICAL Entitled with practical adoptability, such drill bit's high quality can keep its high performance for a long time.
  • APPLICATION Our M4x3.3 tap drill bits are suitable for drilling certain types of carbon steel and ordinary steel, copper and aluminum-magnesium alloys.

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