This Heller ProStone masonry drill bit has a diameter of 10.0 mm and is suitable for materials such as masonry, clinker, aerated concrete, natural stone, and lime sandstone. The drill bit is 120 mm long with a working length of 80 mm. The ProStone masonry drill bit drills quickly, effectively, and reliably into stones, making it very suitable for use in cordless drills. The 4-way spiral efficiently removes drill dust. The use of a robust carbide plate ensures a long lifespan. This masonry drill bit can also be used for hammer drilling, although the Heller ProXtreme concrete and natural stone drill bits are better suited for that purpose. The drill bit has a round shank, making it compatible with quick-change or keyless chucks.