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. Finish it all off with these page protectors to keep it all safe from water and other elements. Each one has pre-punched holes with a 2:1 pitch, and fits 8.5×11-inch pages. This package includes 10 page protectors.