... & long life. 4. Special VA Flutes. DIN338 VA Flute HSS Fully Ground Drill Bits , 118/135 split point;Special VA flute ... drilling, long life.Fine heat treatment for the whole body, fully ground process;Material: HSS 4241, 4341, 9341, 6542 available.Specifications ... working days, thank you very much! DIN338 VA Flute HSS Fully Ground Drill Bits