... 50-60, or upon your request;3. Suitable for cutting, drilling various hard non-ferrous materials, such as marble, ... ceramic, hard concrete and brick;4. High performance (sharp cutting &long life)5. Special design available upon request.Superiorities ... Points, Wheels, Cutting Blades, Saw Blades, Mental Pen, Natural Diamond Wheel Blade, Diamond Grinding Paste etc. Vacuum Brazed Diamond drills dry cutting