A guy brought me two stihl chains and wanted them sharpened and wanted two new ones. It says Stihl on the chain, it says 3/8 also but only has a 3 on the drive link. I am assuming it it the stihl 33 chain meaning that it is .050. Am I correct/ According to my cross reference (I am using Carleton chain) it's supposed to give the full number and lettering on the cutter.