TIN Coated HSS Step Drill Bit HSS Hex Shank Step Drill Bit for Metal Driling
Material: HSS M42,M35,6542(M2),9341,4341,4241
Finish: Tin coated,coffee,bright,rainbow colour,Black oxide,Black flute & bright shank
Process: Roll forged, edge ground, fully ground
Standard: DIN 338 (jobber series) DIN 340 (long series) DIN 1897 (stub series)
Diameter: 4mm-39mm
Point angle: 118 degree,135 degree split point
