Transitional Ceramic Segmented Cup Wheel for grinding concrete and stone. Ceramic cup wheels are a bonded diamond tool. It’s a great option that simplifies and facilitates when you want to grind edges, for example, polishing concrete floors. Ceramic cup wheels have a high performance and good life span.50 GRIT: Good and gentle removal. A good first step to sanding edges when, for example, polishing concrete floors.100 GRIT: A perfect step, for example, to remove rough scratches after a previous logging step. Gives a nice result, without damaging the floor. GRIT Part # Cat # 50 CPCC5050 114700 100 CPCC5100 114701 GRIT Part # Cat # 30 CPCC7030 115124 50 CPCC7050 115125 100 CPCC7100 115126 270 CPCC7270 115127 400 CPCC7400 115128 *WARNING – ALL ceramic tools MUST be operated at a low speed (