The 2:1 pitch (21-hole) wire is suitable for all 2:1 Wire Machines. Binding doesn’t get any easier. If you need permanently bound documents with a top quality, contemporary finish, the high-tech GBC WireBind spine is the ideal binding solution. From prestigious client proposals to annual reports. WireBind enables pages to lie flat and rotate 360 degrees for convenient note taking and photocopying. Documents are permanently bound and tamper-proof, so you can rest assured that your work will not only look good but will stay totally secure.