The wheels seem pretty sturdy. I bought two sets and am installing on some small storage ottomans to use as seats. You look beautiful. The balls are made of plastic, the rest of metal. One set of 4 wheels included screws and the other didn't. To be fair the description says "screws not included" but that certainly prevented me from completing my project without visiting the hardware store for 16 more screws. The overall costs have also increased. If screws were included I would give 5 stars.
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