(1) Durable metal and diamond compound (2) Effective in the process of grinding and polishing concrete floor (3) Different colors and Sizes as requested. (4) Competitive price and superior quality.PCD Grinding Cup Wheels come in a variety of different styles and grit sizes. Some are designed for general use while others are created for specific applications. Cup wheels have been designed to fit a variety of hand grinders along with the Terrco Edger and Flex-Shaft machines. The standard sizes range from 4" to 7" with some of the cup wheels reaching10" diameters. A velcro backing pad is available to allow for the use of resin polishing pads. The PCD grinding wheels don't grind, instead, they work quickly to shave away elastomeric products. The advantage of PCD grinding wheels becomes quickly apparent after testing them against traditional diamond grinding wheels. Our selection of PCD grinding wheels work with 5/8"-11 or M14 thread attachments and feature a single row of segments. If you have to remove any kind of elastomeric coatings such as glue, Kempner, waterproofing, mastic, paint, epoxy, or resin, a PCD cup grinding wheel is the way to go. PCD cup grinding wheels offer extended lifespan, fast performance, and the right tool for the job. Be sure to also browse our selection of angle grinders and other tools that accepts the 5/8"-11 or M14 thread attachments.Available in variety of adapter sizes. Popular 5/8-11 threads model and also 5/8" size that comes with an arbor for 7/8" size.  No matter what hand machines you are using for your grinding, these cup wheels should get the job done