Bringing to bear nearly 300 years of experience making and studying knives, Zwilling J.A. Henckels has created a user-friendly whetstone. A 250-grit coarse stone gets dull blades back into shape—even reshaping them when needed—and a 1,000-grit stone puts a fine, sharp edge on knives, all on a sturdy base with non-slip rubber feet. Known for their superior sharpening, Japanese water stones need just a few drops of water to sharpen knives quickly, no soaking or oil required.