Fixture processing has been widely used before the industrial age, including mechanical fixture, woodworking fixture, welding fixture, jewelry fixture, and other fields. Some types of metallurgical tools are also called "molds" or "auxiliary tools", and their main purpose is to repeat the reproduction of a certain part for repeatability and accuracy. Many fixtures are produced because of commercial needs, because many types of fixtures are customized, some to improve productivity, repeat specific actions, or make work more accurate. Tooling fixture is also called tooling fixture, but each industry calls it different, which refers to the same article. The purpose of fixture is in its own processing machine tool, such as ordinary tapping machine or automatic equipment.