Diamond drill bit crown "Dry", 68 mm, M14. M14 thread for use on angle grinders. Vacuum-brazed diamonds ensure a long lifespan and fast drilling progress. Side cutouts facilitate the removal of the core. The crown is designed for dry applications and does not require additional cooling. 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 drill hole more frequently to allow it to cool briefly. Important: Do not drill into the substrate when material is laid.