someone should add to the warning not to use on flat paint walls. these hooks dont stick to flat paint. i lost 2 bradbury plates and some votive candle holders. ive used these hooks on the same items before on semi gloss painted walls and had no problem. i moved into a new apartment and didnt want to use nails and put holes in the walls so i spent a small fortune on command products. now before all my pictures fall down and frames break i"m back to using nails. i would warn anyone using these hooks not to trust them.