GBC ProClick Easy-Edit Binding Spines, 0.625-Inch Spine Diameter, Navy, 110 Sheet Capacity, 100 Pieces Per Box (2514518) Spines open and close without a machine so you can swap pages in and out quickly. Sleekly designed spines for your most important client. Great professional looking presentations - give documents a unique, contemporary look. Anyone can do it - no training is required. Variety of sizes, capacities and colors available.