Fellowes knows how to make high quality binding supplies that will fit your binding needs. These premium Fellowes double loop wire binding spines are designed to be compatible with virtually any 3:1 pitch twin loop or double loop wire binding system. Make a professional and elegant bound document with these double loop wire spines-they are easy to bind together. We have various sizes to accommodate projects with varying thickness, anywhere from 1/4" to 9/16" thick. They all come in 25 packs to help save space and lower cost. Choose a Fellowes wire pack today!