Welded Steel Wool Disc. Steel Wool is used for Sanding and Crystallization of Marbles, Terrazzo, Natural Stones and Granites. Steel wool is also used for stripping, renovating and restoring wood and parquet floors. Used dry or with a stripper, to remove: dirt, varnish or paint on wood, floors. Available in Ø 406 mm or Ø 432 mm.