Ceramic polishing / grinding cups for primarily for edges. Grit options in 5" include 50G, 100G, 200G. There is also 400G offered in a 7". Smooth and polish corners for concrete or other hard materials, even tight corners.
5 in. cup grits include 50G, 100G, or 200G
7 in. cup grits include 50G, 100G, 200G and 400G