This is a professional great quality diamond double row segment grinding cup wheel disc. Suitable for grinding masonry, ceramics, terrazzo, marble, tile, concrete, Metal,Mold,granite and stone. Features: High quality and brand new diamond segment grinding wheel cup with high speed grinding and long service life. With air holes designed to aid in and maintain a cool stable cutting pattern and reduced wear. Designed to provide 30% faster stock removal with double row large grinding segments. Processed with high quality synthetic diamond coating that provides for a more consistent diamond scratch pattern. Great choice for people who do granite and marble worktops, headstones, tilers, builders. Provide very fast grinding action on masonry, stone and concrete. Specifications: Material: Diamond Diameter of Hole: 22mm Package List: 1 * Diamond Segment Grinding Wheel Disc