Include a Victorinox 40999 Medium Crystolon Replacement Stone in your kitchen kit and be ready the next time your sharpener loses its touch. A good replacement stone is a great essential extra to have on hand, especially if you use your cutlery set constantly. Dull blades are the quickest way to a kitchen accident, and a sub-par sharpening stone does nothing to bring those blades back to top-notch operating quality. The medium stone is meant to be used after a coarse stone, and before a fine stone, to further hone and reshape your blade. The Medium Crystolon Replacement Stone makes the perfect middle man, working particularly well on badly-worn blades!