Tumblers and massagers provide the mechanical action that is important to producing sectioned and formed meat products. This mechanical action is responsible for producing the protein exudate that binds pieces together during cooking, as well as improving the migration of ingredients, which improves the water-holding capacity of the meat. Various factors determine the level of mechanical action that is applied, such as the aggressiveness and the length of the treatment and the temperature of the meat. The aggressiveness is largely determined by the design of the equipment, but the length of the treatment and meat temperature are also important.