Wire shelf bracket stabilizer
thingiverse
Shelf was constantly swinging because I bought the single hook shelf brackets (instead of a twin hook one like this -> https://thd.co/3dd5nZG). Screwing a couple (or 4) of these per shelf makes it rock solid. You'll need 2 (per stabilizer) #6 1/2 in. wood screws (example -> https://thd.co/3dbYckk). Advised to drill a small pilot hole.
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