Rapid tooling is often referred to as prototype tooling, bridge tooling, or soft tooling. Rapid tooling is a crucial step on the path to production. Its definition of tooling involves manufacturing used to create products, such as rapid injection molds, rapid die-cast molds, sheet metal prototype molds, quick and easy jigs and fixtures, and other custom tooling parts. Creating rapid tooling to conduct trial production of hundreds or even thousands of parts before mass production is a very useful step for design optimization, functional testing, or pre-production verification.