Marttiini Diamond Sharpener Pen, 1515112, stainless steel, sharpening steel grain size 300

The Marttiini Diamond Sharpener allows you to sharpen harder types of steel such as carbon steel blades. With diamond sharpeners, you quickly remove a lot of steel from the blade. As a result, you get quick results and a more 'biting' edge, but it will be a bit coarser than the result with a natural sharpening stone. Use water while sharpening and dry after use.