Size: 4-1/2"Arbor: 7/8"Grit CoarseHigh Performance Non-Woven Material For Long Disc LifeStrong Backing And Firm Material Provide High Material RemovalCan Be Used On Heavy Corrosion And RustAlso Used On Thick Coatings On Metal Components And As A Fast Paint StripperEssentially, Will Strip And Clean Almost Anything