Scotch Mounting Squares, 1/2-inch x 1/2-inch, Black, 64-Squares (108-SML) Mounting Squares can be used on wood, ceramic tile, gloss and semi gloss painted walls, glass and refridgerators Mounts posters and photos with easy removal and no damage to the wall 1/2 x 1/2 Inch squares Removable. Double-coated foam squares adhere and conform to a variety of surfaces