... , 8, 8.5, 9, 9.5, 10. HSS straight shank twist drill1.Material:HSS M42,M35,6542(M2),9341 ... Diameter:1mm-20mm6.Flatted shank prevents slippage in three jaw chuck 7.point angle:118 degree,135 degree split ... provide all kinds of twist drills,such as HSS straight shank twist drills,taper shank drill,SDS drill bits ... feel free to contact with me.thanks.HSS straight shank drill bit setHSS drill setdrill set HSS ...