【COD】100pcs Double Loop Wire Binder Long Size 12.7mm 40 Holes 3:1 Pitch 100 Sheets Capacity Binding DN

Double Ring Binding has many names: Double Ring Binding, Double O Binding, Double Coil Binding, and Double Ring Binding. This method uses a continuous hinge of double coils to hold the book cover and pages together. They prefer this method because it offers a stylish metallic finish in a variety of colors. This traditional coil binding method secures the pages so they cannot be modified without taking the book apart. Books bound using Double Ring Binding tend to lie flat and the pages can be rotated 360 degrees, perfect for calendars or notebooks.