... 8.5, 9, 9.5, 10. HSS straight shank twist drill1.Material:HSS M42,M35,6542(M2),9341, ... 5.Diameter:1mm-20mm6.Flatted shank prevents slippage in three jaw chuck 7.point angle:118 degree,135 degree ... of twist drills,such as HSS straight shank twist drills,taper shank drill,SDS drill bits,center drills, ... working drill,flat wood bit,Hss reduced shank twist drills,hss hex shank twist drills and so on,but also ...