Cutting & Grinding Wheel is made of A/O, S/C, suiable for cutting, polishing and grinding for metal, steel, stone, marble Cutting ... Using best abrasives, fillers, resin 3. Flat center cutting wheel/depressed center cutting wheel4. Note: Arbor hole sizes, thicknesses and colors ... :for steel, metal, stainless steel, Stone Cutting 3. Fast Cutting 4. very long life 5. easy to use Cutting & Grinding Wheel