These Hilti high-performance drill bits for concrete feature a new design, technically innovative features and are available in two different versions. The newly-designed head with six cutting edges for diameters in the 35-55 mm range ensures even greater performance when drilling into reinforcing bars. A special feature are the drill bit’s helical flutes, marked with the Hilti logo all the way round. The classic design of the four-edged drill bit head has also been further refined and now features narrower helical flutes, and the head is equipped with even tougher, more wear-resistant cutting edges.