Coil binding is a method of binding pages together using a plastic or metal coil that is threaded through holes punched along the edge of the pages. This technique allows the pages to lay flat when open, making it ideal for notebooks, reports, and presentations. The coils come in various sizes and colors, providing options for customization. The process of coil binding typically involves a binding machine that punches holes and inserts the coil. Once the coil is in place, it can be crimped at the ends to secure the pages. This binding method is durable and flexible, accommodating a range of page counts and thicknesses.