The majority of coil users in the USA use a 4:1 (4 holes per inch) hole pattern for binding. That being said, there are actually a number of other pitch patterns available for coil binding and we carry them all. Need 3:1 spines for use with a Proclick or wire system. How about 2.5:1 pitch or Turbocoil supplies for use with larger documents and larger holes to make insertion easier. Or 5:1 for a more tightly wound look that is popular in Europe. We even carry 3.2:1 spirals for use with certain automated punching systems. Take a look at the options below and choose the pitch, color, size and length that you need. It doesn't get much easier than that.