Scotch Mounting Squares 311DCScotch Mounting Squares are a marvel of creation that makes life easier! The double sided foam tape helps to hold up charts, posters and other materials as such. The 40" tape can hold up to 10 lbs. If you want to put up your family meal plan, chore chart or that cool poster, use these mounting squares to get a clean job done. The Scotch Mounting Squares forms a strong bond against various smooth surfaces such as wood, glass, metal and painted walls.