• Model NO.：SED-SD3-SC
• Dia Size：4mm-20mm
• Production Art：Fully Ground or Forged
• Min Quantity：100PCS
• Packaging：Metal Box
• Surface Finish：Original
• 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 Name3Pcs  Straight Flute HSS M35 Cobalt Step Drill Bit Set for Metal Sheet Drilling in Metal BoxSize4-12mm, 4-20mm, 4-30mmMaterialCobalt M35   (HSS is Available)Flute TypeStraight Flute   (Spiral Flute is Available)Flute NumberTwo Flutes   (Single Flute, 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)Package3Pcs in Metal Box   (Plastic Box is Available)Features

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. 135° Spilt Point Tip: increases cutting speed with self-centering and the drills do not run off center.

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

4. The dimension of drilled hole is exact. 

5. Two Flute Design: provides longer life and better chip removal.

6. Only for rotary use.