Spiral-o wire (3:1 2:1pitch ) double wire binding,double loop wire ,twin coil spool and precut

Double Loop Wire Binding is a popular commercial book binding method, and is known by a number of different names including twin loop wire, wire-O, double loop wire, double-o, ring wire, wirebind. With this binding method, users insert their punched pages onto C shaped spine and then use a wire closer to squeeze the spine until it is round. Documents that are bound with wire binding will open completely flat on the desk and allow for 360 degree rotation of bound pages.

Hope Patterns and Pitches
3:1 pitch (3 holes each inch)
2:1 pitch (2 holes each inch)

Material: High quality nylon coated wire