These abrasive sponges allow fine dirt reliably abzuschmiergeln without this can be seen on the surfaces. This is of course not for polished surfaces! So I z. B. lime or thin corrosion layers on ceramic tile, glass, metal parts, etc. removed. Also good for cleaning a cooktop, stains on the wallpaper (if only superficially and not sucked) and on the wall, etc.
However, these sponges wear out very quickly; therefore probably also the large amount per Delivery