Per Tim Holtz www.TimHoltz.typepad.com: - ring binders - if you like to make mini books, flip calendars, or other functioning paper crafts but don't always like the hassle of book binding machines i have the solution for you! ring binders... yep just like the ring binders in a simple office binder but much smaller, and much more functional complete with brads to attach it to your project. these cool hardware pieces have 2 pieces per pack with included brads. each measuring at about 4 3/4" in length, the large size has 1" rings. this simple device has unlimited possibilities. 4 Brads also included.