Norton 04037 Job Pack Sanding Disc, P180 Grit, 5"Maximize dust extraction to avoid contamination in your work environment while delivering a cool, fast cut rate when you choose this ProSand multi air cyclonic A975 fine grit paper hook and loop center hold vacuum disc. Its P graded, seeded gel ceramic alumina abrasive and laser cut vacuum hole design give it long life and the water based, non pigmented stearate avoids color transfer to your workpiece while minimizing load. This disc is a great choice