DIN 338 HSS Twist Drill Bit
Materials: 4241, 4341, 6542, 9341, M35
Flute Size: 0.2mm-20mm
Shank: Straight
Hardness: 6542-HRC 63-66 M35-HRC64-67
Coating: White(No Coating), Nitrogenization(Black), TiALN Coating
The details pls contact us. And there is no problem to produce the special size according to the requirements.