What does the numbers on a chainsaw bar mean?

The numbers on a chainsaw bar typically indicate the length of the bar and the chain pitch. The length, measured in inches, represents the distance from the tip of the bar to where it attaches to the saw. The chain pitch, usually expressed in inches, refers to the distance between the drive links on the chain. Together, these numbers help users select the correct bar and chain for their specific chainsaw model and cutting needs.