Binding Capacity: Binds 2–20 sheets of 20 lb (80 gsm) paper, perfect for smaller presentations and slim reports. Color Options: Includes Black, Gold, Blue, White, and Silver for a professional or customized look. 3:1 Pitch Standard: Features a 32-hole pattern and 1/4 inch diameter loops, compatible with most 3:1 pitch wire binding machines. Letter Size & Custom Fit: Suitable for U.S. letter-size paper (8.5" x 11") or smaller; trim oversized sheets as needed. Secure Permanent Binding: Durable double-loop design keeps pages neatly bound for a polished, professional finish.

These double loop wire binding spines, also called twin loop binding wires or Wire-O binding wire, offer a secure, professional, and stylish way to bind your documents. Featuring a 3:1 pitch wire binding design with 32 loops per spine, these metal binding spines are crafted for durability and a polished appearance. Each wire measures 11 inches in length and can be easily cut to fit smaller books, reports, or manuals.

Perfect for a variety of applications, including heavy-duty wire binding of presentations, calendars, notebooks, and reference materials, these wire binding rings and wire binding combs ensure your pages stay firmly in place. They work seamlessly with any 3:1 pitch wire binding machine to create high-quality, long-lasting results.

This versatile pack of wire binding accessories and binding wire rings gives you the flexibility to complete projects of all sizes while maintaining a professional look. Whether you need Wire-O binding supplies for office documents or creative projects, these spines deliver reliable performance and excellent value.