Heavy-duty Palmyra is abrasive enough to effectively remove baked-on food from cold grates and heat resistant for removing food from hot grates before a cook Made from 100% natural palm fibers Handle constructed from outdoor-grade materials to withstand the elements Approved for use on all Traeger grill grates and flat top grill surfaces Note: Cannot be used over an open flame. Safe for use on Traeger wood pellet and flat top grills. Plastic scraper is not intended for use on hot grates. Plastic scraper safe for use up to 200F/93C, Palmyra bristles safe for use up to 450F/232C