Diameter: 100mm to 180mm Applications: Grinding and polishing marble, granite, masonry, natural & artificial stone surface. Turbo cup wheels are our best selling because of their superior performance and exceptional pricing. They have 3. 5mm diamond height which is twice the thickness of most brands. They are extremely lightweight with a thin yet durable steel back plate. They come in coarse grit only and are very fast acting and aggressive for heavy stock removal. The wheels come with 5/8"-11 female threads and can be use dry with any high speed angle grinder. Used on all types of stones, concrete and masonry.