The SmallRig 5309 11inch Magic Arm Support is crafted from aerospace-grade aluminium alloy and stainless steel. It features dual 1/4"-20 screws and retractable pins on both ends, allowing for the attachment to crab-shaped clamps (ID 3755B) for mounting monitors, video lights, microphones, smartphones, and action cameras. This magic arm effectively prevents twisting of devices featuring anti-twist holes of the same specification, ensuring secure and stable shooting.