Drills with taper shank fully ground DIN345 (ČSN221143)

High-efficient fully ground twist drills with taper shank HSSCo5 with higher thermal resistance are recommended for drilling in parts made of hard-to-machine materials, alloyed steel and cast steel; intended  for  volume  cold  or  hot  steel  working, rolls for rolling mills, heat treatable or carburizing steel, stainless  steel.  They  correspond  with  the norms DIN 345 RN and CSN 221143.