Bolt making machines can produce high-precision and high-strength bolts. There are the automatic 4-Station Bolt Making Machine for high-speed production and the Hexagon Bolt Forming Machine for non-standard multi-step bolts, widely used in construction, automotive, and machinery industries. Harbin Rainbow Technology Co., Ltd. is a major fastener equipment dealer and manufacturer in China. It has factories for cold forging, thread rolling, heat treatment furnaces, and electroplating equipment. With over 30 years of experience, it supplies various fastener equipment to global customers.