The process of machining is used to remove undesirable material from a larger piece of material in order to produce a desired shape. Subtractive manufacturing, as the name implies, is the process of removing material from one piece in order to create another. Milling, turning, and machining are all manufacturing processes that employ cutting devices to shape a piece of material into an intended design. It is sometimes more precisely defined as the process of removing material from a workpiece using power-driven machine tools to form it into a designed pattern. During the manufacturing process, metal components and parts must be machined in some form. Machining is also used to make other materials, including plastics, rubbers, and paper products.