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.

2:1 Pitch Double-O Wire Punch Pattern
21 square/round holes to an 11" spine

2:1 Pitch Double-O Wire Size Guide
Wire Diameter	Approx. Sheet Capacity (20lb. bond)
5/8"	140
3/4"	156
7/8"	187
1"	218
1 1/8"	232
1 1/4"	250

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

3:1 Pitch Double-O Wire Size Guide
Wire Diameter	Approx. Sheet Capacity (20lb. bond)
1/4"	46
5/16"	62
3/8"	78
7/16"	93
1/2"	109
9/16"	125