Shredding soft cheeses (for tacos or mac-and-Jack) and harder foods (say, potatoes for hash browns); use the side with the large holes. The medium-size holes make smaller shreds of hard foods. The tiny holes turn out fine, crumb like Parmesan. The single horizontal sharp edge is for shaving thin slices of hard foods, such as carrots―it’s great if you’re slicing just one, but for a dozen consider a mandoline.