Step drill with drilling diameters from 4 to 45 mm for drilling non-ferrous metals, steel sheets and plastics. Made of HSS steel with TiN (Titanium Nitride) coating. TiN-coated drills are particularly suitable for processing difficult-to-cut materials. TiN coating increases the hardness of the drills, speeds up the cutting process and improves the quality of the workpieces. The titanium nitride layer reduces wear, thus extending the life of the drill bit. Diameter [mm]: 4-45 Length [mm]: 87