HSS-R 19 EL.1-10/0.5MM DRILLS SETA set of carefully made professional metal drill bits, signed by the legendary PROJAHN brand. Drills designed for professional use!!! They are extremely durable and strong!!! Made of very hard steel. Ideal for drilling holes m metals with a thicker cross section. With the cooling of the drill, for example, with water, they will serve for a very long time!All packed in a sturdy metal case, which makes them easy to store and transport.Benefits:- High resistance to breakage- Resistant to high temperature up to 400 °C- Ideally used in drilling unalloyed and alloyed steel, cast steel, cast iron, iron, graphite, bronze, brass and aluminumTechnical data:- 19 pcs. drill bits in metal box 1-10 increase in 0.5 mm increments