? Patented and newest SG ceramic alumina abrasive for exceptional cut rate and life, and best choice on hard-to-grind alloys ? Aggressive cut rate throughout the life of the belt with up to 5X performance advantage over standard belts ? Durable Y-wt. polyester, waterproof cloth backing for improved grain adhesion, reduced edge-fray and better body retention, resulting in longer life and product consistency ? Grinding aid coating means cooler cut, burn-free grinding of heat-sensitive materials, and minimized loading ? Made in the USA