Craftsmen have lots of tools and we are always looking for more. We love our tools, and we especially love the tools that work very well. For those who have a chain saw, this is a great tool. It’s the best chain sharpener I’ve used because not only does it easily produce a sharp cutting tooth, in the same stroke it also knocks down the depth gauge tooth. Stihl makes this sharpening tool but it works on any kind of chain as long as you buy the tool that fits your sized chain. For instance, a .325 chain. Sharp chains are safer than dull chains.