1PCS 4mm-13mm Cobalt Drill Bit, 400mm Extra Long M35 HSS Twist Drill Bits For Hardened Metal Plastic And Wood(4mm 1pc)

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Product description

  • Self-centring design to improve efficiency, high hardness, wear resistance and long service life.
  • The double spiral edge design accelerates chip removal, avoids clogging and improves drilling efficiency.
  • The addition of M35 cobalt improves the durability of the drill under high temperature environment and prolongs the service life.
  • Suitable for drilling hard metals such as stainless steel, alloy steel, cast iron, etc., and can also quickly drill through soft materials such as wood and PVC.

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