Wire-O binding supplies (also called double-o or twin-loop wires) use a continuous hinge of double loops of wire to hold book covers and pages together. Wire binding is popular among graphic designers and offers a stylish metal finish in a variety of colors. The wire binding machines come in models from low volume to full production floor models. This traditional, yet modern method of wire binding secures pages so that they cannot be modified without de-binding the book. Books bound with Wire-O binding spines lay flat and the sheets are able to turn 360°, making it the perfect solution for calendars and notebooks. Available in a large variety of colors, as well as 3:1 or 2:1 pitch (holes per inch). 11" wire binding supplies are the standard length for letter size documents, but for different size documents, spools of continuous wire or custom-cut wire can be purchased. Contact us for more information on custom-cut wires.