Organize important documents at home or the office with Pendaflex SureHook File Folders. Designed to securely and smoothly glide across the rails of your file drawer or cabinet, these folders make it easy to add and remove documents as you need them. With built-in tension springs and bend-resistant rods, these heavy-duty hanging file folders are made to last. Made with acid-free paper stock. SureHook Technology with built-in tension springs. Strong, bend-resistant rods. Slides easily on rails. 1/5 tab cut. Letter-size hanging file folders fit 8-1/2" x 11" documents. Includes 10 Pendaflex hanging folders.