HSS Drill Bit,DIN345 Twist Drill Bit 1) DIA: 1/8 to 4-1/4 INCH or ... )Materail:HSS9341 M2 M35 M42 HSS drill bit DIN345, Taper shank twist drillsMade of high-speed tool steel, strictly according to the ... oxide,Bright,TIN coatedProcess:Roll Foreged,milled,Extruded Hss Drill Bit