DMT - Diamond Mini-Sharp Knife Sharpener - Red (Fine)

These slick little diamond stone sharpeners from DMT are the bees knees. These sharpeners fold up into a portable, pocket-sized form factor that can travel anywhere. They even tout themselves as "The world's best diamond surface for sharpening tools & knives". Portable keychain sharpener Fine diamond stone Sharpen dry or with water - no oil required