Review on Sunjoyco Heavy Duty Diamond Cup Grinding Wheel - Ideal For Concrete, Marble, Granite And Masonry by Chris Laznovsky

This grinder wheel laughs at concrete. Keep this wheel moving as it will dig in if you linger too long. It generates a ton of dust (no surprise there). Advice: let the speed of the tool do the work, do not push down with much if any force. I needed to use two hands to control the tool or else the tool would boss me around (again, no surprise here). Considering that you are grinding concrete the wheel has a surprisingly long life. The only con is that I could not use the regular tool for tightening the wheel to the tool as the cup was too recessed (if that makes sense). I used channel locks instead and the blade stayed attached for the whole job - no problem. If you are trying to polish granite, this is not the wheel for you, but if you want to smooth out a rough concrete surface then look no further.