Double Reinforcement File Box - Our file box organizer is not only exquisite in appearance and fine workmanship,but also stronger. We use the bottom into the bottom plate and the top into the integrated one-piece plastic frame slides to stabilize the box. You can move the file boxes freely without worrying about the box being unstable. Unique File Suspension System - Different from other file box hanging systems, Our file box hanging has been improved and upgraded. You only need to put the one-piece plastic frame slides on the top of the file box easily. After completion, The file box hanging systems has a greater load-bearing capacity, you can not only slide the hanging file back and forth smoothly, but also further strengthen the file box to prevent the box from shaking.