Grillmaster pumice stones have been used in the food service trades for generations to clean griddles without removing the cure and grills without leaving odors and unpleasant after taste. The professional answer to cleaning charcoal, gas and electric BBQ grills. Grooves itself to grill grids. Cleans faster, more efficiently than brushes and scrappers. Removes carbonized food, grease and soot from porcelain and metal grill surfaces. ready to use. Reusable. No gloves or applicators are needed. Works through gentle abrasive action. Shapes to any flat or curved surface. Contains no chemicals or hazardous substances. Safe for hands. Safe to store and use on food equipment.