Neewer 7"/18cm Articulating Magic Arm for Mounting HDMI Monitor LED Lights with 1/4" Thread 15mm Rod Clamp This is an professional 7"/18cm articulating arm with 15mm rod clamp. The professional 7"/18cm articulating arm perfect for LED light, LCD monitor or flash light etc. on cameras. The 15mm Rod clamp is used to connect the shoulder support, camera cage, magic arms, LED lights, flashes, LCD monitors and follow focus and so on. (1) 7"/18cm Articulating Magic Arm (1) 15mm Rod Clamp