The Norton Clipper® double row diamond cup wheel is great for concrete and masonry applications. It has a max RPM of 12,000 along with a threaded arbor.
The Norton Clipper® single row diamond cup wheel is great for concrete and masonry applications. It has a max RPM of 12,000 along with a threaded arbor.
I actually picked one up last week and used it today to grind down some dried self-leveling compound in my kitchen. I kinda made a mess of it and ended up with some high spots. This double row wheel seems to cut very well. Have not used on actual concrete yet but seems well worth the price.