This pocket 3in1 EDC Sharpener with 3 stage sharpening. Similar to Lansky QSharp sharpener but this one is rather more basic. One stage is carbide/metalic for general sharpening of dull knives, while other ceramic one will polish the edge. It also has a small diamond sharpening rod for extremely dull knives which haven't been sharpened for a long time. Note that this rod is very coarse, so use only to grind the knives which are seriously dull. To get the best results, the blade shouldn't be pressed hard at all into a sharpener, work your way with light press. Sharpening angle is fixed, at about 22-22.5 degrees so you always get the same sharpness which is very good for having a really sharp knife, but to get a true razor knife, some lower angles would be desirable here. Very versatile, small, fits in the pocket without even noticing it. Sharpener has a hole in which you can put the lanyard or little chain so carrying is very easy. Great for taking outside or travel.PROS:Really small.Sharpening is easy and fast.Can make a knife razor sharp (depends on a steel hardness) but sharpens excellent.Easy to maintain/clean after use.CONS:Fixed sharpening angle of 22.5 degrees on each side, more angle choice would be perfect.