- A universal double ball head with cold shoe and 1/4’’ screw on both ends- The ball mount can be easily rotated by 180 degree and secured by the side wingnut- The locking knob is used for securing and operating the ballhead fast【MULTIFUNCTION】it can be mounted to a cage or camcorder's shoe mount, and allows for the attachment of a full array of video accessories. 1/4’’ screw on the top for monitor and led lights- Not recommend for monitor or LED light over 1.0 kg/2.2 lbs