Crafted with a strong, self-sharpening zirconia alumina abrasive, BlueFire R823P/R884P coarse grit cloth wide belts deliver fast and aggressive cutting and a 30-percent longer life than competing zirconia belts. R823P belts feature a flexible, X-weight, polyester, waterproof backing for top performance during light- to moderate-pressure work, while R884P belts feature a durable, Y-weight, polyester, waterproof cloth backing for excellent results during medium- to high-pressure applications. Use these belts for light-to-moderate coarse grit work on all metals and woods. A durable resin bond ensures excellent grain retention over extended use.