3D printers are an additive manufacturing technology that allows the creation of three-dimensional objects from digital models. Different types of materials, such as plastics, metals, and resins, are used to create custom and complex parts in a single pass. 3D printers are ideal for rapid production of prototypes, custom parts, and production tooling. They are also used in medicine for the creation of prostheses, in engineering for the creation of parts, and in architecture for the creation of models.