... 1. popular products 2. 500-5000rpm Feature1. For marble, granite, concrete, engineered stone and other stones.2. Flat finish, fast and ... grinder.4. Designed to produce a flat, swirl free finish on counter tops, floors, walls and steps.5. Use coated abrasives ... diamond wheels or brushes to grind, hone, polish or clean concrete, terrazzo, marble or granite surfaces.6. Wet and dry use ...