... -ferrous materials, such as marble, granite, glass, ceramic, hard concrete and brick;4. High performance (sharp cutting &long life)5. Special ... itself.5, Cutting granits,concrets,rebars,ceramics,glass,woods,plastics and so on,which is highly efficient.6, Strong structure It ... Pen, Natural Diamond Wheel Blade, Diamond Grinding Paste etc. many types and long life vucumm brazed Core Drill Bit for marbles