Keep your files rolling. Many offices share filing system. With the Mobile Plan Center, rather than having to empty a storage container to present a group s work, you can roll your documents where you want them. No muss, no fuss and no unnecessary shuffling. The self-contained mobile storage system features heavy gauge steel construction. It rolls easily to any location on four ball-bearing swivel casters (2 lock). The width adjusts to fit 24" to 42" Hanging Clamps. Hanging Clamp Models 50026, 50036 and 50046, sold separately. Mobile Plan Center can accommodate up to 18 clamps that simply drop in and lift out as needed. Easy set up.