Box of 25 Dura-Gold Premium 3" Diameter 60 Grit Surface Prep Grinding Discs with Backing Pad Set. 25 Quick-change surface prep grinding discs that come with quick-change disc adapter holder with both a round and a hex 1/4" drill shanks.Premium quality high-performance medium coarse-cut 3" surface prep grinding discs with male R-Type quick change connection that attaches to the included disc adapter holder.Superior quality surface prep grinding discs 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. It has maximum resistance to clogging and loading, increasing your productivity and reducing material consumption.These medium coarse-cut surface prep grinding discs are ideal for sanding on all types of surfaces. Use them for semi-aggressive sanding and grinding on automotive paint, primers, body fillers, and putties before painting or for removing scratches on wood and paint.Our surface prep grinding 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.