Based on the self-developed “small core diameter” laser technology, the STR-HW Series handheld laser welders adapt a new dual circuit refrigerant direct cooling system and integrated structural design. These welders can   provide customers with such experiences as high effectiveness, large penetration, high energy-efficiency, and   high convenience. These welders can weld various metal materials, including aluminum, stainless steel, carbon   steel, galvanized sheet, brass, etc. (The welder for welding special materials can be customized per user’s   requirements).