New 7" Extra Coarse 20Grit Professional Diamond Grinding Cup Wheel with 5/8"-11 Arbor- Premium Quality. This grinding cup wheel is perfect in construction for concrete surface preparation and tilt wall finishing at a fast removal rate. Great for removing of glues and adhesives as well. This is also great for fast grinding and rough debarring. This cup wheel is ideal for fast stock removal of concrete, stone and masonry with very low dust. An excellent choice for finer finish grinding. 5/8"-11 arbor fits most angle grinders and floor grinders. Use wet or dry. Better Quality, Service and Reliability Guaranteed!