This Heller ProStone masonry drill has a diameter of 18.0 mm and is suitable for masonry, clinker, aerated concrete, natural stone, and sand-lime brick. The drill is 600 mm long with a working length of 400 mm. The ProStone drill quickly, effectively, and reliably bores into stones and is very well suited for use in cordless drills. The 4-way spiral efficiently removes drill dust. The use of a robust carbide plate ensures a long service life. 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.