Derived from the verb `to pour,` casting is the process of shaping melted substances or minerals by pouring them into specific molds. The ultimate goal of casting is to transform the melted materials into usable products that provide benefits. Metal injection or pressure casting is a metal casting process performed by injecting molten metal under high pressure into a mold cavity. The mold cavity is created using two hardened tool steel molds that have been shaped and processed similarly to an injection mold. Most die castings are made from non-ferrous metals, especially zinc, copper, aluminum, magnesium, lead, tin, and tin-based alloys. Depending on the type of metal used, either a hot chamber machine or a cold chamber machine is used. Aluminum, zinc (a zinc and aluminum alloy), brass, magnesium, and lead are the most commonly used metals and alloys in metal injection casting.