Well, this question may sound a bit silly but it is not. In fact, it is right to ask if you will be sharpening for the first time and are unaware of these sharpeners. You may, indeed, not know what this sharpener is. Thus, you may even wonder whether it is a sharpener for pocket knives or is a pocket-sized sharpener. We are discussing about the latter here.
Well, a pocket knife sharpener is a portable tool designed for those who want to sharpen a knife’s blade on the go. Most of these models typically come with diamond and ceramic abrasives. However, a few feature a sharpening rod for handling serrated blades as well as pointed edges.
If you are looking for standard knife sharpeners, we have a great article on that here. If you are looking for a cheap knife sharpener read about them here.