jyoutz
Super Member
The companies classify them that way. They are listed as such in their catalogs. Largely the materials that the head, piston, rings, and other components are constructed with. Pro saws also have a higher percentage of replaceable parts. Your large Stihl saws are pro saws.Curious what is your definition between a 'pro' saw and a run of the mill saw? Inquiring minds want to know.