These pads are the proper denseness for use with our metal polish. When polishing metal, a by-product is a dark, black film. It often contaminates pads and cloths making them non-reusable. With these pads however, simply rinse them with warm water and the black mess is gone. Re-use over and over again. The Mini Pad Holder attaches via the pads hook and loop and makes any job a lot easier.