The product was discontinued by the manufacturer. I can see why. The design is suboptimal and will result in being rendered useless too easily. One unit I test has a broken locking mechanism designed to prevent removal of a hot mold from the unit. The silicone molds tear easily when trying to get the injection molded car body out of the mold. I would not recommend getting this toy. Get the later model produce by Mattel in 2012, Mattle's Hot Wheels Car Maker.