This 14 mm diamond core drill is designed for creating passages for 1/4" and 3/8" water lines through hard tiles. It uses a vacuum-brazed diamond tip for fast, clean cutting and has an M14 thread for a direct, stable fit on an angle grinder. The internal wax coolant allows for efficient dry drilling by reducing heat, which increases cutting speed and prolongs the bit's life. This tool provides the precision needed for professional plumbing and electrical installations.