For the past 30 years, Cherng Ji has developed a highly mature single-layer roofing roll forming machine which is especially improved at the tolerance of components in order to increase the performance of the machine. Furthermore, Cherng Ji is also dedicated to enhancing the hydraulic system and control system for the single-layer roofing roll forming machine. It is our ultimate goal and responsibility to fulfill the clients' requirement. Cherng Ji has also developed multi designs with different production speed to meet clients' needs. The client can choose to have fly shear roll forming machine if facing a large number of products which production speed is over 50m/minutes. Single-layer roofing roll forming machine is the best machine to meet the demand worldwide.