Norton 04034 Hook and Loop 3X Sanding Discs, 100 Grit, 5"Highlights: Disc Size: 5" Grit: 100 Hook & loop backing for quick and easy disc change Lasts 3x longer than conventional aluminum oxide, and has consistent finish and superior cut rate Non pigmented, waterbased zinc stearate (anti clog), open coat for reduced loading and no finish contamination Patented, ceramic alumina abrasive, P graded (80 320) Patented, universal vac hole pattern fits 5 & 8 hole vac sanders Unique fiber reinforced backing is edge