3pcs HSS Cone Spiral Grooved Step Titanium Drill Bit Set Hole Cutter 4-12/20/32mm

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  • 1 x 4-12mm Spiral Grooved Drill
  • 1 x 4-20mm Spiral Grooved Drill
  • 1 x 4-32mm Spiral Grooved Drill
  • Mainly used within 5mm sheet steel drilling, a drill bit can replace the use of multi-branch;according to the needs of different diameter hole, and can achieve big hole to complete a one-time processing, without having to change the drill bit and hit the positioning holes and so on.
  • The ladder of its unique structure, a bit can open a variety of specifications of aperture.
  • Do not need to use center punch, compared with the ordinary twist drill is not easy to be broken.
  • Deburring, chamfering, elliptic hole enlargement, twist drill, the function of them  was unable, but it is possible.

The overall ladder drill using CBN grinding whole manufacturing, the main material for high-speed steel, carbide, high precision machining,according to different processing conditions can be surface coating to extend tool life, add to enhance durability.
  • Material : High speed steel
  • Surface :Titanium Plated
  • Scop : thin iron plate,aluminum,insulation panels,PVC panels 5mm thickness within the timber.
  1. 4 - 12 mm 9 Steps (4mm,5mm,6mm,7mm,8mm,9mm,10mm,11mm,12mm),6.5cm(L)
  2. 4 - 20 mm 9 Steps (4mm,6mm,8mm,10mm,12mm,14mm,16mm,18mm,20mm),7.7cm(L)
  3. 4 - 32 mm 15 Steps (4mm,6mm,8mm,10mm,12mm,14mm,16mm,18mm,20mm,22mm,24mm,26mm,28mm,30mm,32mm),10cm(L)
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