Eligible for FREE Super Saver Shipping on orders over $25Henckels 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 modules, which are marked on the sharpener. The first module features steel wheels for coarse sharpening and presharpening, and the second module uses ceramic wheels for fine sharpening and smoothing.This sharpener works well for both right- and left-handed people, features rubber feet so it won't skid on the countertop, and measures approximately 8 inches across and 3 inches tall, so you can store it in a drawer or display it in a small space.