Norton Abrasives Cyclonic Series sanding discs are designed for dimensioning parts, deburring, grinding & blending welds, and grinding & finishing casting. These sanding discs feature ceramic abrasive for efficient sanding and holes for vacuuming. They have hook-and-loop attachment for being secured to the disc pad. The paper backing material provides a strong adhesive for abrasive grains. Choose from a wide range of hook-and-loop sanding discs, available in 80, 150, 180, 220, 320 and 400 grit sizes on Raptor Supplies.