A document held together by a coil that spirals through holes punched along the spine is a common method of binding pages. This binding style allows the book to lay flat, or even fold back on itself, providing ease of use in various situations. Notebooks, reports, and calendars are frequently assembled using this technique.
The advantages of this binding approach include its relatively low cost and durability. The ability for the publication to lay flat makes it ideal for situations where hands-free reference is required, such as cookbooks or instruction manuals. Historically, this binding type gained popularity due to its practicality and efficiency in mass production, offering a robust and accessible option for a wide range of printed materials.