The Rikon 5” PSA Sandpaper Disc is a resin bonded aluminum oxide abrasive disc designed to work with the Rikon 50-151 Belt/Disc Sander. It should work equally well on any sander that will accept a 5” PSA backed disc. The Asst.-Grit package contains 2 ea.; 80, 120, 150,180 & 240 grits. This is a 10 pack.