Description drillpro hss co m35 cobalt step drill bit triangle shank 4 12 4 20 4 32mm spiral flute step drill1 high speed steel cobalt m35 suitable for aluminum insulation board pvc board chamfer steel aluminum sheet metal carbon steel 304 stainless steel etc 2 industrial grade cobalt plating more than 4241and 6542 high speed steel materials live longer 3 triangle shank make more stable clampingspecification brand drillpromaterial m35 coblat hss co shank triangle shankflute spiral flutesizeshank diameterstep rangestep height4 12mm 5 step 6mm4 6 8 10 12mm7 5mm4 12mm 9 step 6mm4 5 6 7 8 9 10 11 12mm4 5mm4 20mm 9 step 8mm4 6 8 10 12 14 16 18 20mm4 5mm4 32mm 15 step 10mm4 6 8 10 12 14 16 18 20 22 24 26 28 30 32mm4mm features 1 cnc cnc cbn grinding wheel 2 118 x bit design you can drill from any angle no slipping 3 new notch design great chip removal small resistance geat heat dissipation 4 higher accuracy sharper achieve drilling burr 5 plated cobalt coating a substantial increase in the wear resistance and oxidation resistance 6 triangle shank make more stable clamping 7 ideal for cutting through metal wood and plastic quickly and easily package included 1 x step drill bitmore details
