Steer clear of pull-through knife sharpeners, the ones that grind both sides of the blade simultaneously, says Matthew Nash, who runs the Sharpening Service UK, a mobile and postal sharpening ...

For a knife sharpener that’s camping-friendly, pick up the Material Kitchen The Sharpener. It is small enough to fit in a pocket and is $20 at Amazon.

Whether you prefer electric, manual, or pull-through pocket knives, we reviewed the best pocket knife sharpeners from Work Sharp, Lansky, and more.