Index divider system allows you to organize multiple binders in a matter of minutes with the help of a laser or inkjet printer or your copier. Each set includes one index, one Table of Contents page and an instruction sheet. Letter-size sheets are three-hole punched to fit inside standard three-ring binders. Each index divider features Mylar-reinforcement on the tab and binding edge.. Post consumer recycled content: 50%. Recycled content: 100%. Made in USA.