My Rubbermaid shelves fell off and these brackets literally broke in the middle. Now I'm installing these out of metal and they're a game changer. They seriously hold up MUCH better. I would also recommend drilling them into studs. You'll save yourself a lot of headaches and frustrations in the future. Your shelves will be much more stable with these metal brackets: ClosetMaid 7561 Concrete Mount Shelf Brackets Pack of 12: https://www.amazon.com/gp/product/B000GKXS12/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1Yes, they fit Rubbermaid -Shelves. I used them specifically on Rubbermaid Free Slide Racks.
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