This is a new set of 15 assorted high speed steel twist drill bits;Great for drilling ferrous metals, tough casting sand forgings, working hardened stainless steel and other hard steels and tough high tensile strength nonferrous metals like titanium;They can be used with a Dremel tool

• SE 15 HSS Drill Bits Jewelers Drilling Tools fits Dremel

SE 15 HSS Drill Bits Jewelers Drilling Tools fits Dremelse