Aluminium oxide abrasive grain resin bonded to X-weight backing cloth. Overlap joint with extra top-skive for reduced chatter. For sanding wood, paint, varnish, plastics, plasters and metal. Fits all 13 x 457mm file sanders. Aluminium oxide abrasive grain resin bonded to X-weight backing cloth. Overlap joint with extra top-skive for reduced chatter. For sanding wood, paint, varnish, plastics, plasters and metal. Fits all 13 x 457mm file sanders.