These little hooks are so nice! With the removable strips on the back of the hook, it is hassle-free to remove the hook without damaging the wall. It needs to be applied to a smooth surface. When removing the hook, simply pull downward the strip (must be straightly downward, if you pull with an angel against the wall, it may still rip off pieces of your wall), and the hook is off. I like it very much. It's very good for apartment renting, to minimize damages and get back more of your secure deposits. The hooks are also reusable, you just need to replace the strips.