Find 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 visibleďż˝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"; Material(s): 9 Pt. Stock.