... 1. popular products 2. 500-5000rpm Feature1. For marble, granite, concrete, engineered stone and other stones.2. Flat finish, fast and ... easy to operate.3. Can be equipped with 220V or 110V polisher and grinder.4. Designed to produce ... diamond wheels or brushes to grind, hone, polish or clean concrete, terrazzo, marble or granite surfaces.6. Wet and dry use ...