A set of ground drill bits HSS-G, meeting the DIN 338, RN standard, the drill bits are made of high-quality high-speed steel (HSS), the steel is refined with alloys - Tungsten 9%, Molybdenum 3%, Chromium 4%, Vanadium 1% - for drilling steel up to 900 N/mm. Precise grinding of the helix for maximum performance, precision and good centering, thanks to the grinding of the angle of the tip of the drill 118° it is possible to drill even without the use of a hole punch, intended for industrial use.