Neewer 11"/28cm Articulating Magic Arm for Mounting HDMI Monitor LED Lights with 1/4" Thread 15mm Rod Clamp This is an professional 11"/28cm articulating arm with 15mm rod clamp. The professional 11"/28cm 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) 11"/28cm Articulating Magic Arm (1) 15mm Rod Clamp