An attractive and impressive method for joining the pages and cover of a bound document: the coil is inserted and twisted through small holes punched along the spinal edge of the book’s cover and pages.

The pages can be opened cover to cover. This allows an open book to fold back upon itself and yet still remain flat, so it stays open for easy reference and yet takes up minimal room on a desk or table. Also, it can accommodate pages and inserts of varying thicknesses,

A good choice for high page count projects.