A planetary mixer is a type of kitchen countertop mixer used for mixing, kneading, and beating various types of dough, batters, and other food products. Planetary mixers usually have several speeds, allowing for finer control over the mixing process. They are usually capable of mixing a variety of ingredients, including wet and dry, as well as more delicate food products such as egg whites. Planetary mixers are designed with a motor that turns around a central, stationary mixing shaft. The motor is connected to a series of rotating arms that spin around the stationary shaft. These arms are fitted with beaters, whisks, and dough hooks, which rotate around the shaft, mixing the ingredients.