Title: Can only be used on carpet
Review: I cannot believe I bought these things. Total impulse buy but I thought they would be useful.They are NOT. What it doesn't say in the product description is that they can only be used on carpet. Not hardwood floors. They will scratch the dickens out of your floors. I wasn't really paying attention when I opened the box they came in so the return time period expired by the time I realized this. Oh well, maybe I can sell them at a garage sale.
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