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 & removing pages doesn't mean removing & 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".