Norton 97516 Blaze Multi-Air Cyclonic Grip-On 6 in. 320 Grit Sanding Disc (50. Featuring Multi-Air Cyclonic precision laser cut technology, a spiral vacuum hole design, and a P grade, sharp edged ceramic alumina abrasive, Blaze Multi-Air Cyclonic A995 fine grit paper H&L center hole vacuum discs last longer and minimize work area contamination while cutting cooler, faster and more consistently than other paper discs. ).