GBC ProClick Pronto P3000 Binding Spines, 5/16in, 40-Sheet Capacity, Black, Pack Of 100

Easy to use, no machine required for editing. After you have punched your documents with the GBC ProClick (or any 32-hole wire punch machine), the spines simply snap together. The pages turn easily and lie flat. Its fun, easy to use and doesnT require a machine to bind so you can add and remove sheets anytime.