Description
3:1 Double Loop Wire Spools – Twin Loop Binding Wire
Our 3:1 double loop wire spools provide a secure and professional binding solution for books, reports, calendars, and presentations. Also known as twin loop wire, double loop binding wire, or ring wire binding, this binding style delivers durability and a sophisticated finish.
Designed for use with automated twin loop wire binding machines, wire spools allow you to cut custom lengths for efficient, high-volume production.
Available in 2:1 and 3:1 Double Loop Wire Spool
We stock 2:1 pitch and 3:1 pitch double loop wire spools, accommodating approximately 30 to 220 sheets of 20 lb paper, depending on diameter selection.
3:1 Pitch Wire – Ideal for thinner books and documents
2:1 Pitch Wire – Designed for thicker book projects
Key Benefits of Twin Loop Wire Binding
✔ Secure binding
✔ Tamper-resistant design
✔ Pages open a full 360°
✔ Books lay completely flat
✔ Professional, high-end appearance
9 Color Options Available
Choose from nine different colors to complement your cover design, branding, and logo for a polished finished product.
Looking for 2:1 pitch Spools of Twin Loop Double wire.
11″ wire 3:1 cut to 32 loops
11″ wire 2:1 cut to 21 loops
Consider our Tornado super punch for automated punching
Choosing the Right Pitch: 2:1 vs. 3:1 Spools
When selecting double loop wire spools, the “pitch” refers to the number of holes per inch. Choosing the correct pitch is determined by the thickness of your document and the punching pattern of your binding machine.
3:1 Pitch (3 Holes Per Inch)
This is the most common pitch for professional office documents, presentations, and smaller booklets.
Best For: Thin to medium-thickness documents.
Capacity: Typically holds between 30 and 120 sheets of standard 20 lb paper.
Look: The holes are closer together, providing a refined, elegant appearance for smaller projects.
Compatibility: Must be used with a 3:1 pitch punching machine.
2:1 Pitch (2 Holes Per Inch)
This pitch is designed for versatility and is the industry standard for high-capacity binding.
Best For: Medium to very thick books, manuals, and large catalogs.
Capacity: Accommodates a wider range, from 30 up to 220 sheets of standard 20 lb paper.
Look: The loops are spaced further apart, which provides the structural integrity needed to support heavier, thicker documents.
Compatibility: Must be used with a 2:1 pitch punching machine.
Quick Comparison Table
| Feature | 3:1 Double Loop Spools | 2:1 Pitch Spools |
| Holes per Inch | 3 Holes | 2 Holes |
| Sheet Capacity | 30 – 120 Sheets | 30 – 220 Sheets |
| Diameter Range | 1/4″ to 9/16″ | 1/4″ to 1-1/4″ |
| Primary Use | Reports, Books, & Presentations |
Technical Guide: Selecting the Correct Wire Diameter
Choosing the right size for your 3:1 double loop wire spools is just as important as choosing the pitch. To ensure a professional finish where pages turn freely, you must account for the total thickness of your document, including the front and back covers.
How to Measure for 3:1 Double Loop Wire Spools
Measure the Thickness: Lay your document (including covers) flat on a table and measure the total height.
Add the “Wiggle Room”: To allow pages to turn 360°, add 1/8″ (approx. 3mm) to your measurement.
Match the Spool Size: Choose the spool diameter that most closely matches your final total.
