The Diamond Mini-Sharp Sharpener is portable and convenient for travel. Its folding handle protects the sharpening stone when not in use. Lightweight and ultra-portable, it features a handy keychain swivel ring that allows you to attach it to your keys or zipper pulls. Sharpening with diamonds is quick and easy; there’s no need for messy oils—you can sharpen either dry or with water. It is available in extra-coarse, coarse, fine, and extra-fine diamond grits.