Quickly sharpen any product with the Jokari Ultimate Knife Sharpener. Made with ultra strong carbide steel sharpeners set at the optimum angle for a perfectly sharpened knife every time. This is by far the handiest gadget you can have around your kitchen. Hone your blades in only ten seconds and keep your knives in mint condition. Turns the dullest blade into a cutting machine. Not recommended for serrated knives.