High strength pure aluminum precision forging triangle: adopt high strength pure aluminum precision forging technology, so that the strength and stability of the leg frame is higher. Automatic gear adjustment design: automatic Angle adjustment plate, more quickly adjust high, medium and low three angles. Foot lock system: the new design of foot lock system is fast and stable, highlighting the stability of the foot again improved performance. Retractable studs: newly designed studs allow photographers to cope with harsh field conditions Beautiful field work.