3M Sandblaster, 6 Pack, 180 Grit, 3-2/3" x 9", Sandpaper With No Slip Grip Backing, Backing Is Perfect For Fast Stripping Of Rust, Paint, Varnish & Very Rough Surfaces Using Sharp Minerals & Strong Resins That Cut Fast & Last Long, Lasts 10 Times Longer Than Conventional Sandpaper.