Unlike standard punched grating tools, these fine and coarse graters feature holes that are sharpened to enhance their effectiveness. Made of 18/10 stainless steel. Grating surface is securely laser-welded to the strong frame. Nonslip rubber feet for stability. Coarse grater is ideal for grating potatoes and other firm vegetables, fruits and soft cheeses. Fine grater is ideal for grating citrus peels, hard cheeses such as Parmigiano-Reggiano and chocolates. From the German company Rosle, manufacturers of quality kitchen tools since 1903. Dishwasher safe.