Office Depot Stak-A-File(TM) Starter Set With Hangers, Clear, 59761 Space-saving vertical, letter-size files for papers and folders Mount on the wall of your office, clinic, warehouse or factory (hardware included). Set includes 3 plastic wall pockets. hese file holders may be used separately or nested together to form a system. Adjustable to fit over a cubicle wall up to 4 inches thick.