Norton® BlueFire R823P 80 Grit Plyweld RR Joint X Weight Wide Belt measuring 37" X 60" is made of zirconia alumina abrasive material and is ideal for all metal as well as wood applications. Belt with polyester waterproof cloth backing has long life on high-pressure, dry/wet, heavy-duty metal applications. Open coat cotton belt is suitable for stock removal on wood with limited loading. Durable belt has moderate flexibility and is optimal for fine grit applications. It is sold as 3 per pack.