Double Loop Wire Binding Supplies 2:1

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.