HSS Drill Bits Standard:ANSI B.94.11M-Single Ended Craftmanship:Fully Ground Surface:Black,white,TIN Long life fast drilling HSS Drill Bits,ANSI B.94.11M-Single Ended, Fully Ground Manufacturing Process:Fully GroundMaterial:4341,9341,M2,M35,M42Standard:ASME B.94.11MSizes: according to your demandsSurface Finishing: White, TIN Coated, Rainbow Color, Bright, Black & Bright, Zirconium Coating, Black ...