ProClick Easy Edit SpinesMake your proposals and reports stand out with a sleek, professionally finished look. Insert document and use zip tool (incl.) to snap the clicks together. 32-ring plastic spine lets pages lie flat with 360° rotation for convenient note taking and photocopying. Use with any WireBind® binding system or with pre-punched paper. For 11" size documents. Sheet Capacity: 45; Spine Diameter: 5/16"; Number of Rings: 32.