The Transvideo Heavy-Duty 3D Swing Arm is designed for mounting the 6 and 8" CineMonitorHD Monitors to ARRI Alexa cameras. The slide on the top features a clamp that allows you to attach the monitor via the bottom slide, its back, or any extra slide. It features a progressive tie-down knob for easy attachment. The arm attaches to the Alexa camera via a special 3/8"-16 male thread with positive locking on the bottom that prevents rotation. Thanks to the die-cast stainless steel body, it fits perfectly and securely on the side or on the handle of the camera.