1. Central locking system. Five-axis high-speed precision carving, 0.5mm pitch rectangular display processing of the central control locking knob, feel good bold "Q"-shaped opening design, rotating half a circle can complete the elastic shape design is equally ingenious, the curved handle surrounds the circular base, does not take up space.2. Central control safety buckle and 1/ 4 "screw hole. Using the five-axis linkage process, the safety buckle can be pressed to remove the central axis or panel. 1/4 "expansion screw hole can be used with Leofoto AM-1 or AM-2 series magic hands to take pictures of cameras and mobile phones at the same time.3. 3/8 "anti-rotation screw hole. Mr.Q adds a 3/ 8 "expansion screw hole on the other side. Both sides are equipped with anti-rotation system, can be used with AM-3, AM-4 high lock magic hand, external IPAD, flash or other heavier equipment for quick photography, Camera and light distribution at the same time.