Description Best in class. Features a one piece molded backing for increased performance with consistent finish and longer disc life. Offers a premium mineral for superior performance in metal grinding applications. Powered by Cubitron? Abrasive: The Cubitron? abrasive grain is a ceramic mineral with a unique micro structure that sharpens as it wears. These sharp cutting edges result in high cut rates, long life and amazing consistency. -Cooler Running -Faster Cutting -Longer Lasting -Self Sharpening