3" ADT dry diamond polishing pads are ideal for polishing granite tile edges and concrete floors. They are velcro backed. The set includes 50 grit, 100 grit, 200, 400, 800, 1500, 3000 and a buff, the most popular color series are for back velcro. They are much longer lasting than traditional honeycomb dry pads, especially when it comes to polishing concrete surfaces.