Coil binding is one of the most popular binding methods due to its professional appearance, lay-flat design and ability to flip pages 360 degrees. Spiral coil spine binding elements are perfect for business proposals, annual reports, calendars, company presentations and any other book binding project. Multiple use length 36 inch spiral coil binding spines are long enough to trim to fit all binding edge spine sizes up to 36 inches.
These binding coils have a 4:1 pitch (4-holes per inch, 144 loops per 36" coil) and are fully compatible with all 4:1-inch pitch coil binding machines on the market. Holes punched in sheets can be round or oval.
Choosing desired coil size: Measure the thickness of your stack of pages and add 1/8-inch (3mm).