Profile: Main Plastics Group Ltd. specializes in providing metal stamping services. Our products are widely used in aerospace & defense, medical & life sciences, transportation, semi-conductor & electronics, energy, environmental, security and HVAC industries. Our mold production is done usually using either our CNC machines (computer numeric control) and or our EDM machines (electrical discharge machining). Pre-hardened steel molds are less wear-resistant might be a better choice if volume output is lower or are looking for larger components. We also consider aluminum molds, which are less expensive to make and are designed and machined using modern computerized equipment but the softer material does not support extensive runs.