Metal spirals / combs / Binding

The double-loop spirals are produced “open” to be inserted in pre-punched holes of the suitable dimensions. Once inserted in the proper holes they are simply crimped closed with a wire closer.The 3 to1 (3:1) pitch is used for books up to about 1/2″ thick and 2 to 1 (2:1) wire can be used for books up to about 1-1/8″; However 2 to1 (2:1) can be also manufactured from 1/4″ to 9/16″  on demand.

High quality 5/16" 3:1 Pitch Twin Loop Wires are some of the best wire binding spines on the market today. Also called Wire-O, WireBind, and Double Loop Wire, these silver  3:1 pitch elements let pages lie flat with 360 Degrees rotation for convenient note-taking and photocopying as well as provide a permanent bind to your documents--meaning your pages stay secure and protected. Not only that, but these 3:1 pitch wire spines look a tad more refined than a plastic comb or spiral coil.. These  3:1 pitch twin loop wires come open in a "C" shape, allowing you to insert the spines into your punched pages and then simply use your wire binding machine or wire closer to finish your books. Product number W516SV.