... /64 to 5/8 inch M42,M35,M2(6542),etc fully ground,milled HSS straight shank twist drillStandard: DIN338size :in metric,from ... ,M2,9341,4341,4241.production technics:rolled forged,rolled&posished,fully ground,milledsurface finishing:black oxide,bright finished,titanium coated,black flute ...