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Twin Loop Wire Binding
2:1 Pitch Double-O Wire spines lets pages lie flat with 360° rotation for convenient note taking and photocopying, and it permanently binds documents. That way you get the peace of mind in knowing your presentations always look great and stay secure. 2:1 pitch means the binding machine punches 2 square or round holes per inch, for a total of 21 holes on an 11 inch binding spine. 2:1 pitch generally binds from 140-250 sheets of 20lb. paper. 2:1 pitch binding wire requires a 2:1 pitch binding machine that punches square or round holes and closes the wire through crimping.
3 :1 Pitch Double-O Wire spines lets pages lie flat with 360° rotation for convenient note taking and photocopying, and it permanently binds documents. That way you get the peace of mind in knowing your presentations always look great and stay secure. 3:1 pitch means the binding machine punches 3 square or round holes per inch, for a total of 32 holes on an 11 inch binding spine. 3:1 pitch generally binds from 45-125 sheets of 20lb. paper. 3:1 pitch binding wire requires a 3:1 pitch binding machine that punches square or round holes and closes the wire through crimping.
2:1 Pitch Double-O Wire Punch Pattern
21 square/round holes to an 11" spine
3 :1 Pitch Double-O Wire spines lets pages lie flat with 360° rotation for convenient note taking and photocopying, and it permanently binds documents. That way you get the peace of mind in knowing your presentations always look great and stay secure. 3:1 pitch means the binding machine punches 3 square or round holes per inch, for a total of 32 holes on an 11 inch binding spine. 3:1 pitch generally binds from 45-125 sheets of 20lb. paper. 3:1 pitch binding wire requires a 3:1 pitch binding machine that punches square or round holes and closes the wire through crimping.
3:1 Pitch Double-O Wire Punch Pattern
32 square/round holes to an 11" spine
Wire-O Binding Capacity Chart:
Simple steps to get the proper fit for wire binding.
Take the book being bound and lay it flat on a table
Don't compress the paper and measure the thickness of the binding edge
Take the measurement and add 1/8" - that will be the size of the binding element
* Note: the capacities listed below are approximations, determined using standard 20 lb. bond copy paper; the actual sheet capacity will vary depending on the materials being bound.
** Note: The smaller 2:1 pitch wires from 1/4" up to 9/16" are a special-made wire, and are not available in all colors.
| Wire Diameter | Pitch (Holes per Inch)** | Sheet Capacity* | Book Thickness* | Quantity / Box |
| 1/4" | 3:1 or 2:1 | 11-25 Sheets | 1/8" | 100 Wires / Box |
| 5/16" | 3:1 or 2:1 | 26-45 Sheets | 3/16" | 100 Wires / Box |
| 3/8" | 3:1 or 2:1 | 46-65 Sheets | 1/4" | 100 Wires / Box |
| 7/16" | 3:1 or 2:1 | 66-80 Sheets | 5/16" | 100 Wires / Box |
| 1/2" | 3:1 or 2:1 | 81-100 Sheets | 3/8" | 100 Wires / Box |
| 9/16" | 3:1 or 2:1 | 101-120 Sheets | 7/16" | 100 Wires / Box |
| 5/8" | 2:1 | 121-145 Sheets | 1/2" | 100 Wires / Box |
| 3/4" | 2:1 | 146-165 Sheets | 5/8" | 100 Wires / Box |
| 7/8" | 2:1 | 166-185 Sheets | 3/4" | 100 Wires / Box |
| 1" | 2:1 | 186-210 Sheets | 7/8" | 100 Wires / Box |
| 1 ⅛" | 2:1 | 211-235 Sheets | 1" | 100 Wires / Box |
| 1 ¼" | 2:1 | 236-260 Sheets | 1 ⅛" | 100 Wires / Box |