Suitable for alloyed and unalloyed steel up to a tensile strength of 1000 N/mm², stainless steel V2A/V4A, grey cast iron, cast steel, acid and heat resistant steels. Precision drills with pronounced heat resistance and wear resistance. For use in drill stands or column drills. The HSS-Co drills are available in two qualities. The Topline drills for the highest demands and the standard drills for professional use.