Citrus juicers, as their name suggests, juice Citrus Fruits. So Lemons, Limes Oranges and Grapefruits, and all similar fruits are to be used in this device. A centrifugal juicer however can juice most non-citrus fruits, as long as the fruit has juice to extract then a centrifugal juicer can usually juice it. Fruits such as Bananas cannot be juiced though.