Hanging File Folders with Innovative Top RailFind files fast with this revolutionary, patented design. Unique style lowers the top rail of the hanging folder so that the tabs of your interior files are completely visible—there's no need for plastic tabs on the hanging file. Expands 1/2" to accommodate growing files. 9 pt. stock. Hanging File Folder Type: Low Top Rail; Size: Letter; Expansion: 1/2".