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Spiral Groove HSS Ladder Step Drill Bits Set for Metal Wood Hole Saw Drill Bit Set,10-45mm in Saudi Arabia Spiral Groove HSS Ladder Step Drill Bits Set for Metal Wood Hole Saw Drill Bit Set,10-45mm in Saudi Arabia Spiral Groove HSS Ladder Step Drill Bits Set for Metal Wood Hole Saw Drill Bit Set,10-45mm in Saudi Arabia Spiral Groove HSS Ladder Step Drill Bits Set for Metal Wood Hole Saw Drill Bit Set,10-45mm in Saudi Arabia

10-45mm Step Drill Bit HSS Cobalt Step Stepped Nitrogen Spiral Step Cone Metal Cutter Metal Cone Triangle Shank Hole Drill Tools

SAR 75
All electronics ship with US style plugs. You may need a voltage converter or a plug adapter.
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Special Features

  • Unique ladder structure , it can open multiple Aperture
  • it can not easily be broken.8 stepped:10,15,20,25,30,35,40,45MM
  • It can deburr, chamfer and open hole, but ordinary twist drill can't
  • The step drill bit is made from upgraded high speed steel characterized by well-balanced toughness, wear resistance and red hardness properties for better and faster hole -drilling performance. The coating makes the drill bit more durable so that it can last for years with uncompromised quality.
  • Surface Treatment:nitrogen treatment (increasing the hardness and abrasion resist.Material: HSS 4241

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