Make your proposals and reports stand out with a sleek, professional finished look. Insert document and use the zip tool (incl.) to snap the clicks together. The 32-ring plastic spine allows pages to lie flat with 360° rotation for convenient note-taking and photocopying. Use with any WireBind binding system or prepunched paper. For 11 inch size documents. Global Product Type: Bonding Thorn Comb; Joining spine type: Comb; Blade capacity: 45; Column diameter: 5/16 inch.