sourcing map 4mm Cutting Dia Cemented Carbide Twist Extra Long Drill Bit with Round Straight Shank for Hardened Steel Stainless Steel, 120mm Length 4 Pcs

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  • Cemented Carbide - Twist drill bits are made of cemented carbide tip for easier drilling into any hard objects, long service life, it is more sharp and durable than others.
  • Features - Milled U-flutes with deep-cut spiral deliver fast material removal. Suitable for drilling in tough metal, including abrasive alloy and hardened steel.
  • Round Shank - Straight round shank twist drill bit can work with an electric drill (electric drill not included).
  • Use Note - Please use low speed when drilling and note the temperature of carbide tip is not too high for extending drill bit life.

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