The CYL-5 drill bit guarantees maximum service life when drilling concrete and stone. The combination of a Bosch proprietary carbide compound and diamond-ground cutting edges makes the drill extremely wear-resistant. Friction on the spiral from the drilling material is significantly reduced thanks to a 2-spiral Vario design with a short, variable inclination. The Bosch Power Grip shank system ensures 100 % power transmission from the machine to the drill bit. In this way, the power transmission can be transferred directly to the drill without loss and with less wear. For dowel drilling in concrete, natural and artificial stone. The drill bears the PGM Masonry Drill Bit Association Board quality test mark, which guarantees conformity with strict tolerances, precise drill holes and a firm hold of the fastening material.