Couldn't find one that works with wrought iron rails so used zip ties here. I think any tree will do in this case, but I don't like returning items. DISCLAIMER If you try this, make sure the zip ties secure the tree on both sides to keep it in place. Also check them from time to time to ensure safety. This is just to keep my toddler from going upstairs. I wouldn't recommend using this for a top of the stair solution.
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