Unique design allows folders to function like ring binders. Flexible self-adhesive fastener attaches to any folder, allowing pages to lie flat for easy viewing or photocopying. Plastic tubing bends as you fold back papers so adding and removing pages doesn't mean removing and replacing any of the other pages. Each fastener holds up to 2" of paper. Fastener Subtype: U-Clip; Fastener Capacity: 2"; Fastener Sheet Capacity: 160 Sheets; Center To Center: 2.75".