This Heller ProStone masonry drill has a diameter of 20.0 mm and is suitable for materials such as masonry, clinker, aerated concrete, natural stone, and limestone. The drill is 600 mm long with a working length of 400 mm. The ProStone masonry drill drills quickly, efficiently, and reliably into stones, making it very well-suited for use in cordless drills. The 4-way spiral quickly removes drill dust. The use of a robust carbide plate ensures a long lifespan. This masonry drill can also be used for hammer drilling, although the Heller ProXtreme concrete and natural stone drills are better suited for that purpose. The drill features a reduced, round shank, making it compatible with quick-change or keyless chucks.