• Model NO.：SED-HSDH
• Dia Size：4mm-32mm
• Production Art：Fully Ground or Forged
• Min Quantity：1000PCS
• Packing：Setcase,Plastic Box,Metal Box
• Surface Finish：Tin-Coated
• Transport Package：PVC Bag, Blister Card, Plastic Box, Metal Box etc
• Specification：ISO9001, SGS, CE
• Trademark：EASYDRILL
• Origin：China
• HS Code：820750900
• Production Capacity：200, 000PCS,Month

Procuct NameSpiral Flute hex Shank HSS Tube and Conical Step Drill Bit for Sheet Metal Tube DrillingSize4-20mmMaterialHSS   (Cobalt M35 is Available)Flute TypeSpiral Flute   (Straight Flute is Available)Flute NumberSingle Flute   (Two Flutes, Three Flutes are Available)Shank Round Shank   (Three Flats Shank, Quick Change Hex Shank, Double R Shank are Available)Surface FinishBright   (TiN, Black & Amber, Co-coated, Black Oxide, Black & Bright, TiAIN are Available)PackageOne Piece in Double Blister or Plastic TubeFeatures

1. Step drill bits are perfect for drilling and enlarging multiple-holes in thin sections of sheet metals, pipes, plexiglass, plastics, wood up to a thickness of 5mm.

2. A variety of hole diameters can be drilled using only one tool. 

3. Single Cutting Edge:creates perfectly round holes in metal, plastic, wood and other thin materials without center punching.

4. Round Shank provides high precision.

5. Only for rotary use.