Investment Casting, also known as Lost Wax Casting, is a precision casting process that provides design flexibility and significant cost advantages. The Investment Casting process involves pouring molten metal into a mold that has been created using a wax model. Once the mold is made, the wax model is melted and drained away. Hollow cores can be effected by using a heat-proof core that prevents the molten metal from totally filling the mold. Investment Casting is generally used for small castings, but can be used to produce much larger components. Tolerance standard for investment casting is in accordance with VDG-P-690 D2.