Strong yet incredibly flexible! Incorporating the latest technology in ceramic stones, the New SuperStone Ceramic Stones offer an improved cutting ability, increased heat resistance, and longer life. Made of long ceramic fibers that will not break even under the most strenuous conditions, the New Super Stones can be used in ultrasonic polishers, reciprocating profilers, or by hand. Impart uniform surface finishes on molds, dies and precision components. Produce excellent finishing results on stainless steel, copper, aluminum, alloys, silicon, and magnetic materials.