These pads will do as good a job as hard diamonds, except they will not flatten the floor because they will conform to it. Use them on swing machine, on auto-scrubber and/or on burnishers. Best to use them on moist floor but you may use them dry. They are diamond-impregnated on one side, the opposite side of the number. These floor pads are available in 400-grit, 800-grit, 1500-grit, and 3000-grit (all the same price). If you are ordering online, please specify the grit.