drill bit hss drill bit set twist drill bit Certification:ISO9001 Finish:Tin coated,coffee,bright,rainbow drill bit,hss drill bit set,twist drill bitFeatures: 1.Material:HSS M42,M35,6542 ... ground,fully ground4.Standard:DIN 338 (jobber series) DIN 340 (long series) DIN 1897 (stub series)5.Diameter:1mm-20mm6.Flatted shank prevents ...