Hand-operated chaff cutters are still commonly used in some parts of the world, particularly in developing countries where electricity is not readily available. These machines are typically powered by a crank or a lever and are designed to be simple and easy to use. Motorized chaff cutters, on the other hand, are more commonly used in larger operations where a higher volume of feed needs to be processed. These machines can be powered by electricity or a gasoline engine and are generally more efficient and powerful than hand-operated models. Some chaff cutters also feature automatic feeders and adjustable blades that can be set to produce different sizes of feed pieces.