NOTHING, and I mean nothing beats the "Redi-Edge"- in a pinch it'll scrape some meat off the blade with the creamic "V" and has both a bunch of other options like fish hook sharpener, coarse side, drilled hole for lanyard or whatever, finger slot, some have a stropping rod/serration rod.. I wouldn't run a high end blade through it, but it will put a shaving sharp yet toothy edge on just about anything. The coarse side is OK for better stuff, but I think you could literally sharpen a piece of scrap metal with this thing. My favorite version is about 1.5" X 1/2". Ceramic "V" can be flipped and turned for 4 rounds of use before replacing for $8. They average about $25 which seems like a lot for this tiny gizmo but it's a lifesaver if you need it.