KooingTech 4mm HSS Extra Long Drill Bit, 200mm HSS Twist Bit Straight Shank Auger Drill

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Product description

  • Multi mechanical adaptability straight handle design, compatible with handheld drills drilling machines lathes, standardized 8mm handle diameter for faster drill bit replacement
  • Advanced surface treatment Special coating retains cutting fluid to prevent debris adhesion, improves cutting geometry to reduce chip accumulation and formation
  • Precision cutting application suitable for building drilling and metal processing, maintaining a precision of 0.05 millimeters in the processing configuration

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