1" Shop Roll - Resin/Resin Light Duty - 50 Yard Roll - Aluminum Oxide - 400 Grit Aluminum oxide cloth with resin-over-glue bond, for use on ferrous and non-ferrous metals grinding flat or irregular surfaces, cleaning and polishing of rough ground workpieces.. Provides good heat resistance and smooth finishes. The matching shop roll holder is ideal for storing and tearing off the belts to the required length.