SMALLRIG Cool Ballhead Arm Super Clamp Mount Multi-Function Double Ball Adapter with Bottom Clamp for Ronin-M, Ronin MX, Freefly MOVI - 1138 SmallRig Multi-function Double Ballhead 1138 is a multifunctional double ball head with a clamp at the bottom and a 1/4" screw on the top. It can mount monitor and LED Lights on the one end via 1/4 screw, and it can lock the rod on the cage via the clamp tightened by the locking knob. It could be attached and detached from the monitor quickly and the position of the monitor is adjustable as per your needs during shooting. The rod clamp fits DJI Ronin & FREEFLY MOVI Pro & all 30mm rods and can also be adjusted with ease. The best load &lt; 1.21kg