Advertisements said they were "self-adhesive", but when they arrive they don't really "stick". There is a form of non-slip material after the bottom plastic is separated, but it can still slip. It "CAY" works as advertised, but as a 67-year-old I didn't risk "falling down a whole flight of stairs" to find out. There is double sided tape included but I didn't think I would need it. I used it AND carpet nails. I was happy with the product but the description is a bit misleading.
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