Core Bit 2"Core Depth = 3 1 4". Engineered with ADM (Advanced Diamond Matrix) diamond patterning and layering technology. Extra long life. Vacuum brazed protection on the outside and inside of the core. Designed to cut holes in granite. Segmented rim for a very fast cut. Wet or dry cutting. Application: For Granite, Porcelain, Natural Stone, Artificial Stone. Max RPM: 10,000. Prop 65 Warning: This product can expose you to chemicals, including cobalt and nickel,