product name

 step drill bit

Material

HSS(Cobalt M35 is Available)

Size

3-13mm  /4-12mm / 4-20 mm/ 4-32 mm

Flute Type

Straight Flute / Spiral Flute

Flute Number

single Flutes / two Flute /Three Flutes 

Shank

Quick Change Hex Shank, Round Shank, Double R Shank,Tri -flat shank are Available

Surface Finish

Titanium coated (Bright, Black & Amber, Co-coated, Black Oxide, Black & Bright, TiAIN are Available)

Color

Amber Color ,Bright, Black Oxide, Titanium, Black & Gold, are Available

Package

custom/pvc/box/carton

Features

1. Double helical grooves, Fast chip removal, Reducing cutting resistance

2. The drill bit is suitable for materials below 5mm. If the material is larger than 5mm, the size of the upper and lower holes will be different.

3. Strong cutting force, sharp cutting：Low temperature-High temperature-Low temperature tempering three times to discharge carbon, super toughness, fast drilling