I made a terrible mistake, my haste cost me. Took 3 Stihl chains to a large Stihl dealer to sharpen. $7.50/chain. One for ms362, 20" bar, two for ms200, 14" bar. You wouldn't believe how bad! The difference in length of cutters was negligible before they got them; I know that because I put a caliper on them this morning! Wow, some teeth look now to be 1/4 to 1/3 shorter than others! I wish I lived near this dealer, I would march right back in there and show the owner; they should give me something in return for this butchering. I also noticed that the ends of the cutters look burnt. Makes me so mad! These were pretty new chains, all Stihl brand.