Robert SorbyDiamond Sharpening File

they make a grate tool that works

This is the best tool I have ever found to touch up a tool edge while working with the tool. It take a second to touch up and edge .The quality of this tool is far above any other I have found.

Great tool. Very helpful to have in the shop to touch up hollowing tools.

This sharpener is so much better than the DMT ones that I have used. Seems to not clog up and cuts well if you use a little "spit" first. I recommend it.

Too small of field and doesn't seem to cut like I would expect diamond chips to work on small cutting knives. But, it is better than nothing and much easier to use than trying to set up on a regular grinder each time to tune up the cutting edge.