Long service life, thanks to high material strength (64 HRC), special cutting geometries suitable for impact screwdrivers and a TiAlN (titanium-aluminium-nitride) coating. The accessories are low-wear and low-friction as well as heat-resistant up to 800 °C and can therefore be used with high turning and impact frequencies in steel up to 900 N/mm2. Optimally suitable for the following materials: unalloyed and alloyed steels up to 900 N/mm², aluminium, brass.