Product Description Wire binding is a popular commercial book binding method, and is known by a number of different names including twin loop wire, wire-o, office exercise equipment, double-o, ring wire and wirebind. ... Documents that are bound with wire binding will open completely flat on a desk and allow for 360 degree rotation of bound pages.
Hole patterns and pitches 3:1 pitch (3 holes per inch) The three to one pitch hole pattern is most commonly used for binding small sized documents with double loop wire. Spines for this binding style are available in sizes between 4.8 mm (3⁄16 in) and 14 mm (9⁄16 in) in diameter. Three to one pitch wires are not available in sizes larger than 14 mm (9⁄16 in). The hole pattern used for 3:1 pitch wire binding can use either square or round holes. 2:1 pitch (2 holes per inch) Although a two to one pitch hole pattern is most commonly used for binding larger sized documents it can also be used for binding smaller diameter books. Two to one pitch wire is most commonly found in sizes ranging from 16 mm (5⁄8 in) up to 32 mm (1+1⁄4 in). However, a couple of manufacturers make special small sized 2:1 pitch wire for binding documents as small as 6.4 mm (1⁄4 in). RENZ GmbH own the registered trademark for One Pitch which is a brand describing the small 2:1 pitch wires 1/4" through to 1/2".
