Home Series graters are dishwasher-safe and feature surgical-grade, photo-etched stainless steel blades. Easy grip handle and cover are included. Dishwasher safe, however it is recommended rinsing your grater in warm water immediately after each use. The Course Grater is ideal for hard and Medium firm cheeses, such as Parmesan, Romano, and Cheddar, as well as a wide range of vegetables from apples and pears to coconut and potato.