Box of 25 Dura-Gold Premium 3" Diameter Maroon Medium Sanding Grit Surface Conditioning Discs. Roll lock quick-change conditioning discs only. Quick-change disc pad holder not included.Premium quality high-performance medium-cut 3" surface conditioning discs with male R-Type quick change roll lock connection that attaches to an adapter holder.Superior quality conditioning discs are made with super-coated aluminum oxide corundum fused with zirconia alumina. It delivers a fast, exceptionally long-lasting sharp cut with a consistent scratch pattern.These medium-cut surface conditioning discs are ideal for sanding on all types of surfaces. Use them to sand automotive paint, primers, body fillers, and putties before painting or removing scratches on wood and paint.Our surface conditioning discs are suitable for use in auto body and paint shops, woodworking, wood furniture making, metalworking, metal sanding, crafting, household, drywall, industrial, fiberglass, plastics, or any other surface that needs sanding.