For exceptionally flat sanding on all wood floors with a buffer, double-sided sanding discs provide more aggressive and cleaner cutting than traditional screens or single-sided discs. The unique design eliminates the need for an extra hardplate. Will not tear, wrinkle or waffle like single-sided discs. No "dish-out" of soft grain like a screen. Sands exceptionally flat. Ideal for parquet, inlays, borders, and multi-specie floors, as well as traditional strip and plank. Ideal for scarifying concrete and abrading slab leveling materials to achieve a flat and smooth surface.