Check out these 1/4" removable aluminum fasteners often used for photo albums, swatch books, architectural and engineering drawings, menus, and many other applications where loose sheets need to be kept together. These 1/4" aluminum screw binding posts are sometimes called Chicago screws or Chicago screwposts, and they consist of two pieces (screw and post) that are designed to be inserted into round hole punched papers and covers. Measuring 1/4" in length, these screwposts should be used to bind documents of the same 1/4" thickness in order to acheive maximum strength. Screwposts are perfect for binding large documents and can even be combined with screwpost extensions to reach any length you might need. These particular 1/4" screwposts are designated with the product number SO014ASP.