Finally, a Knife Sharpener anyone can use! With just a few passes even the dullest knife in your kitchen will slice through tomatoes using only the weight of the knife. This handy tool will sharpen your highest quality knives with just a fraction of the effort needed to use a sharpening stone. The diamond-honed tungsten carbide blades will also sharpen just about anything with an edge - cleavers, shears, even lawnmower blades and garden tools. They will not rust and can be cleaned with soap and water. Best of all, the pre-set, reversible/replaceable blades are always at the right angle, making you an instant sharpening expert.