The Cinch Book Binding Machine by We R Memory Keepers makes book binding quick, easy and affordable. Punch perfect holes with customizable hole spacing on any size project. Then thread the covers and pages onto the Cinch binding wire. When your project is finished, add these storage pouches to keep all your favorite pens, markers, and stickers close at hand. This package includes 3 pouches in various sizes, each with pre-punched holes with a 2:1 pitch (8.5×11, 5×7, and 4×6 inches). Imported.