... row, Turbo, Swirl 3. Grit No.: Course, Medium Diamond Cup Wheels are designed for grinding and polishing marble, granite, concrete ... Diameter: 100mm-250mm.2. Application: Diamond double row grinding cup wheels are ideal for form mark removal, deburring, chamfering, smoothing ... , natural & artificial stone surfaces.3. Fast cutting with minimal dust, used dry or wet grinding.4. Type: Single row, Double ...