Core Bit 4" XtremeProfessional grade hole cutting performance across porcelain, ceramic, granite, marble, and slate. Engineered with superior brazing technology, the diamond coating remains securely bonded through extended uselasting up to 12 times longer than standard hole saws. Compatible with grinders, this bit operates with simple water dipping for cooling, eliminating the need for complex water delivery systems. Experience up to 50% faster cutting speeds compared