... process:roll forged,edge ground,fully ground4.Standard:DIN 338 (jobber series) DIN 340 (long series) DIN 1897 (stub series)5 ... as HSS straight shank twist drills,taper shank drill,SDS drill bits,center drills,step drills,masonry drill,,wood working drill,flat wood bit,Hss reduced shank twist drills,hss ...