Stadea 7-Piece Diamond Floor Polishing Pads Set for Concrete, Marble & Stone Floors – Perfect for Professional & DIY Floor Restoration & Polishing Projects

These are high quality pads, hence the price. But they're really made for a walk behind grinder/polisher as they require some machine weight to work effectively. I use a hand held planetary grinder/polisher and because it has little weight to it (even with me bearing down on it) and these pads have so much less surface area than the cheaper pads, the combination of the two results in less contact, which requires many more passes than with pads that have far more surface area. These do seem to "grab" more and again, they are of high quality so I can't fault them and will give them 5 stars. But again, you need a heavier machine to get ideal results from these pads. For a hand held floor or countertop grinder/polisher, you're going to be better off with the cheaper pad sets that certainly won't last as long but will get the job done with far fewer passes required.