So glad I have these hooks. They stick well to concrete walls (this will certainly happen to tiles or wood) and are ready to use. If you want, you can wait 24 hours before using it. I used two of these hooks to hang the metal clock shown in the last photo. I haven't had any issues with them peeling off or the watch falling off. It can support whatever weight it has, and if you want to hang something heavier, add more hooks so the weight can be evenly distributed.
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