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Rubbermaid twin track hardware (heavy objects) sold at menards/home depot. for utility closets and laundry/basement shelving.
Rubbermaid 9" Twin Bracket, Satin Nickel
Shelving brackets with unique double slot design supports up to 500 pounds per bracket pair....
Pretty good organizing system esp. for the price. Rubbermaid FG4C0502WHT 4C0502WHT 11-1/2" White Twin Track Bracket and Track - Rubbermaid - 4C0502WHT