Bedrocks 7" - 12 segment soft bond cup wheels are designed with a large diamond grit for fast production. Wide gaps between segments help prevent loading or gumming up. This cup wheel works great for hard concrete and to help break the glaze on hard troweled floors. Fast production for harder concrete. A Soft bonded Diamond Cup wheel, will keep exposing new sharp diamond to help grind hard concrete. Get the most out of your production with a soft bond cup wheel and save on labor.