Diamond drill bit crown "Dry", 45 mm, M14. M14 thread for use on angle grinders. Vacuum-soldered diamonds ensure a long lifespan and fast drilling progress. Side cutouts allow for easy removal of the core. The crown is designed for dry applications, and no additional cooling is required. For consecutive drilling, it is recommended to briefly cool the crown with water after each drilling. The recommended usable length is the thickness of the tile, porcelain stoneware, or granite slab, typically a maximum of 2 cm. Granite slabs or countertops can be drilled up to 5 cm. In this case, the crown should be pulled out of the hole more frequently to allow for brief cooling. Important: Do not drill into the substrate when the material is laid.