Manufactured with an extremely hard titanium nitride coating (TiN), the HSS step drills master every challenge. The precision-ground tapered drill bits drill reliably into the metal to be processed. Thanks to the hard-wearing TiN coating, the countersink drills are heat-resistant, wear-resistant and guarantee a long service life. The high-quality drill bit set consists of three HSS TiN step drills in the sizes 4-12 / 4-20 / 4-32 mm. The titanium-coated peel drills have up to 400 % longer tool life compared to conventional HSS drills and are suitable for alloyed and non-alloyed steels such as cast iron, non-ferrous metals and plastics. The metal drill bits are supplied in a robust aluminium box for safe transport. The drill bit set is ideal for professional use in industry, trade, workshops and DIY. Scope of delivery: 3 x steelwork HSS TiN step drill bits. 1 x aluminium box.