Originally Posted By: thseng
For field use, I carry a Diamond Mini-Sharp Sharpener Fine Grit

I really prefer to use "extra fine" grit for most regular sharpening, but the "fine" grit is good in case you also need to repair some damage.



I concur, DMT diamond stones are excellent. Perfect for a quick touch up and they work well with even the hardest of modern blade steels.

I prefer this model though:

http://theconsumerlink.com/DIAMONDMACHININGTECHNOLOGY/detail/TCL+FWFC/110

It's a bit bigger than the keychain size model, but it's faster to use and you get both a course and fine edge.