3:1 Pitch Wire Binding Supplies

3:1 pitch wire-o binding supplies feature 3 loops per inch and pair with any 3:1 pitch wire binding machine. Also called twin loop or double-o wires, these binding spines offer a classic and clean metal finish that loops great and offers full 360° page turning. 3:1 pitch Wire-O comes in sizes from 1/4 inch up to 9/16 inch, which means it can be used for books from 2 to 120 sheets in size. All sizes are available in bulk, 100 wires per box.

Wire-O binding is known by many names: double-loop, double-o, duo-wire, and also twin-loop binding. This method uses a continuous hinge of double wire loops to hold book covers and pages together. This traditional method of wire binding secures pages, so that they cannot be modified without unbinding the book.

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3:1

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  1. Gold 3:1 Wire-O Twin-Loop Binding Spines (Box of 100)

    • Available in sizes from 3/16" up to 9/16"
    • Books bound with Wire-O double-o wires lay flat and the sheets can flip a full 360
    • Offer a semi-secure binding method that can only be un-bound if cut off.
    • Sheet Capacity: 2 - 120 Sheets

    Starting at: $17.90

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  2. Navy 3:1 Wire-O Twin-Loop Binding Spines (Box of 100)

    • Available in sizes from 3/16" up to 9/16"
    • Books bound with Wire-O double-o wires lay flat and the sheets can flip a full 360
    • Offer a semi-secure binding method that can only be un-bound if cut off.
    • Sheet Capacity: 2 - 120 Sheets

    Starting at: $26.36

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  3. Gray 3:1 Wire-O Twin-Loop Binding Spines (Box of 100)

    • Available in sizes from 3/16" up to 9/16"
    • Books bound with Wire-O double-o wires lay flat and the sheets can flip a full 360
    • Offer a semi-secure binding method that can only be un-bound if cut off.
    • Sheet Capacity: 2 - 120 Sheets

    Starting at: $26.63

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  4. Green 3:1 Wire-O Twin-Loop Binding Spines (Box of 100)

    • Available in sizes from 3/16" up to 9/16"
    • Books bound with Wire-O double-o wires lay flat and the sheets can flip a full 360
    • Offer a semi-secure binding method that can only be un-bound if cut off.
    • Sheet Capacity: 2 - 120 Sheets

    Starting at: $26.63

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  5. Fellowes 3:1 Black Double-Loop Wire Binding Spines

    • Provide a professional appearance to bound documents
    • Compatible with most wire-binding machines with 3:1 punching pitch and 32-hole pattern.
    • Diameter: 1/4" - 9/16"
    • Sheet Capacity: 2 -130 Sheets

    Starting at: $13.21

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