Description drillpro 99pcs m35 cobalt drill bit set 1 5 10mm hss co jobber length twist drill bits for stainless steel wood metal drillingfeatures high quality material m35 cobalt added 5 cobalt to improve hardness and heat resistance the rockwell hardness is up to 67 it has a faster cutting speed and a longer service life which is 12 times that of an average hss bit accurate card position self centering the guiding separation point of the 135 rapid cutting is automatically centered and can be penetrated quickly under a small pressure the straight shank can be firmly fixed and accurately centered suitable for standard drill trays and conventional circular trays efficient and fast high efficiency drilling can be carried out without walking remove debris and particles faster and easier low cost the lowest cost of drilling each hole the solid cobalt steel drill bit can be reground split point you can drill directly to the required size without pre drilling widely used suitable for drilling stainless steel copper cast iron galvanized pipe iron aluminum alloy and other non heat treated metals whose hardness is less than hrc38 not suitable for hardened steel high carbon steel if it cannot penetrate try to adjust the speed specifications product name99pcs m35 cobalt twist drill bits set branddrillpromaterialhss co m35 cobaltsize16 pcs x 1 5 mm 16 pcs x 2 mm 15 pcs x 2 5mm 10 pcs x 3mm 10 pcs x 3 2mm 8 pcs x 3 5mm 8 pcs x 4mm 3 p
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