The Mobile Stand is ideal for your project files that require mobility, accessibility and ease of use. This popular self-contained storage system is perfect for presentation days and storage of large art and engineering documents. Helps eliminate fingerprints and tears. Organizer includes 12 Pivot Brackets that swing wide to allow easy access to clamps and their contents. Features steel construction with four 3" ball bearing swivel casters, front 2 lock. Holds up to 12 Safco Products Hanging Clamps Models 50016, 50026, 50036, 50046, 50056 (sold separately). Weight capacity of 240 lbs. or 20 lbs. per clamp. Use with Safco Products Data File Extension Model 5056 for extra storage (sold separately). Easy set up.