This 18 mm diamond core drill is designed to create precise, chip-free holes for electrical conduit and water pipes in hard tile and granite. It features a vacuum-brazed diamond tip for durability and an M14 thread for a direct, stable fit on a standard angle grinder. An internal wax core provides lubrication for efficient dry drilling, which cools the bit and extends its service life. This tool delivers consistent, high-quality results for professional installations.