1) Left and right punching head adopts hard synchronous feeding device, thus
  avoids useless deformation and made the connection more firmly
2) Easy machine setting due to the synchronous feeding device
3) Convenient tool setting due to the screw adjustment
4) Single-tool and multi-point corner combining tool is available, which makes the
  combination of insulation bridge aluminum profile more firmly
5) Power is controlled by hydraulic system, thus it works stably and smoothly