... 2)HSS9341 M2 M35 M42 HSS drill bit / Taper shank twist drillsMade of high-speed tool steel, strictly according to the ... standards,including general, long, lengthened and extra-long taper shank twist drills,the products quality and their long life-span have ... ,M42,HSS4341,HSS4241...Finishing Color:Black oxide,Bright,TIN coatedProcess:Roll Foreged,milled,Extruded Long taper shank twist drill bit DIN341