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.
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