If it has skin, it can peel it. Most of these options utilize a pronged fork to keep the fruit in place, which means it will work seamlessly with various types of fruit and vegetables. Users typically use their devices for things such as pears, lemons, potatoes, carrots, zucchini, onions (for slicing), and even tomatoes. Just be sure that what you intend on peeling is firm enough on the inside or else you might end up with a little bit of a mess.