Suitable for alloyed and unalloyed steel up to a tensile strength of 900 N/mm², cast steel, gray cast iron, sintered iron, malleable cast iron, non-ferrous metals, hard plastics. Precision ground HSS-G steel drill bit allows up to 40% faster drilling progress or up to 50% lower feed force than standard ground HSS drill bits with tapered shell. Self-centering cross-ground drill point eliminates the need for pre-coring or pre-drilling up to 10 mm Ø. The HSS-G drills are available in two qualities. The Topline drill bits for the highest requirements and the Standard drill bits for professional use. 1-pack. 4.1 x 43 x 75 mm.