RECOMMENDED USE: For use on Paint (Body filler, paint, primers),Metal (Ferrous metals), Aluminum (Non-ferrous metals) and Wood (Plastics, wood and fiberglass)FEATURES: Aluminum oxide grain provides a fast cut with long life, stearate coating and semi open coat structure prevents loading . 80-150 Grit: "D" - heavy-weight, low flexibility paper backing. 180-400 Grit: "C" - medium-weight, low flexibility paper backing. For automotive body work, removing varnish from wood, sanding fiberglass, and for use on metal. For use on random orbital or low speed DA sanders - For dry use only. Available in PSA Disc Rolls.COMPATIBILITY: Disc SanderSPECIFICATIONS: 6" diameter, 400 grit