This aggressive turbo cup grinding wheel provides for very fast cutting action on masonry, stone and concrete. High diamond concentration for longer life and aggressive material removal | Large grinding segments with heat treated steel bodies which provides increases durability and wheel life | Common used for dry/wet grinding of concrete, granite, stone, marble, tile, masonry and some other construction material to smooth uneven surfaces and remove flashing | The 4” diamond grinding wheel features air holes designed to aid in maintaining and cooling the cutting pattern and reducing wear | We provide 5-Year Worry-Free Warranty and Unconditional 90-Day Refund & Free Lifetime Technical Support. Buy with confidence.