The J.A. Henckels Twin Sharp Duo Knife Sharpener is suitable for all knives with a fine edge, with the exception of coated knives. The stainless-steel sharpener comprises two marked modules. The first module features steel wheels for coarse sharpening and resharpening, and the second module uses ceramic wheels for fine sharpening and smoothing. This sharpener works well for both right- and left-handed people and features rubber feet so it won't skid on the counter top.