Gator Grit 3" x 5" x 1" Large 120 Grit Sanding Sponge. This premium sanding sponge combines the performance of finishing sandpaper with the convenience of a sanding sponge. This allows the sanding sponge to sand faster and longer than traditional sanding sponges. The 120 grit sanding sponge is used for moderate sanding. The sponge will allow you to sand irregular shapes and contours. For use on wood, metal, fiberglass and painted surfaces