Long taper shank twist drill bits DIN341 1) DIA: 1/8 to ... to 120mm 2)HSS9341 M2 M35 M42 HSS drill bit / Taper shank twist drillsMade of high-speed tool steel, strictly according ... standards,including general, long, lengthened and extra-long taper shank twist drills,the products quality and their long life-span ... ,TIN coatedProcess:Roll Foreged,milled,Extruded Long taper shank twist drill bit DIN341