With the Bosch Dry Speed diamond core cutter, you cut clean 68 mm holes in hard ceramic tiles and porcelain stoneware quickly and without water cooling. Designed to mount directly on standard angle grinders with a 22.23 mm bore, it delivers fast and smooth drilling performance. The vacuum-brazed diamond grit set in a durable metal matrix prevents cracks and chipping when drilling openings for electrical junction boxes and sanitary installations. It gives you the speed, durability, and precision needed for demanding tiling jobs.