This abrasive turbo cup grinding wheel provides for very fast cutting action on masonry, stone and concrete. Large grinding segments with heat treated steel bodies which provides increases durability and wheel's life.With air holes designed to aid in and maintain a cool stable cutting pattern and reduced wear.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. https://www.high-tech-grinding.com/grinding-polishing-machine/radial-type-diamond-concrete-grinding-cup.html