This Dual-Knife Sharpener from Victorinox is compact, portable and has a list price of $19. It looks like a pen and will fit comfortably in your pocket along with your Swiss Army Knife.

The collaborators also had to consider how the sharpener could operate in remote public places with no access to a charging point. Even with its expertise around steel, knives and knife care, the team ...

If you'd prefer to use a sharpener dedicated solely to your Swiss Army blade, Victorinox does make a Pocket Knife Sharpener that you can currently pick up through Amazon for just over $20.