Pumie works through gentle abrasive action. takes over where other abrasive cleaning aids leave off. scours away mineral deposits, rust, stains and scale from sinks, tubs and showers. removes unsightly toilet rings. cleans baked-on food, grease and carbon buildup in ovens, on grills and iron cookware. a 100% pumice product. works through gentle abrasive action. won't harm hard surfaces. safe for skin. safe to use and store around children and pets.