SMALLRIG Cool Ballhead Multi-Function Double Ballhead with Shoe Mount & 1/4" Screw for Monitors Led Light - 1135 UNIVERSALITYa universal double ball head with cold shoe and 1/4 screw on both ends 180 DEGREE ROTATIONThe ball mount can be easily rotated by 180 degree and secured by the side wingnut LOCKING KNOBthe locking knob is used for securing and operating the ballhead fast MULTIFUNCTIONit 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 NOTICEnot recommend for monitor or LED light over 1.0 kg/2.2 lbs