This is the second one I bought the first one was great until grinding over a crack and a concrete chunk came up made my grinder jump and it was off balance after so ordered a new one very smooth again very good price may order another just to have a spare on the job
This ridged grinding wheel is just the thing for grinding concrete. Word of warning: there will be a lot of concrete dust when grinding. Use a shroud on your grinder to keep it to a minimum.