Mirka Abralon 6 inch Hook Loop Polishing Discs Dust-free sanding Greater efficiency Improved topcoat Combines benefits of abrasive cloth and non-woven products. Constructed with a fabric face, 1/4" thick foam center, and grip backing. Abrasive grains are bonded evenly to the fabric face. Openings in the fabric allow water, solvent and air to flow freely around the abrasive. Especially useful for sanding contoured surfaces, corners and sharp edges. Open cell design holds large amounts of water or solvent for lubrication and cooling. Foam center provides even surface pressure to help eliminate finger marks when hand sanding.