This mounting system holds devices with a 1/420 threaded hole and can be attached to shelves, plate glass, crossbars, steel frames, or desktops. Key features 1/420 screw adapter and universal doubleadjustable bracket compatible with LED lights, monitors, mobile phone selfie sticks, bicycle phone holders, and sports cameras. Knob lock with aluminum alloy knob; turn clockwise to lock and secure, turn counterclockwise to loosen and adjust. Easy to install, adjust, and remove. Includes a 360degree ball joint for full range of angle adjustment. Clamp is rotatable 180 degrees, enabling flexible mounting orientations to fit your camera kits and setup needs. What's included and how it works Supports any device with a 1/4inch thread hole Mounts to various surfaces such as shelves, plate glass, crossbars, steel frameworks, and desktops The universal doubleadjustable bracket provides versatile positioning for multiple devices The 360degree ball mount and 180degree clamp rotation offer extensive angle and direction options Specifications and compatibility Thread size: 1/4'20 Locking mechanism: clockwise to lock, counterclockwise to loosen Ball joint: 360degree rotation Clamp rotation: 180 degrees Construction: designed for durable, reliable performance 23 practical use scenarios Home studio setup: attach a camera or monitor to a shelf using the 1/4'20 thread, mount a LED light with the doubleadjustable bracket, and use the 360degree ball joint to achieve the desired viewing angle. Desk or workstation filming: secure a compact monitor or camera above a desk, adjust height and angle easily, and remove quickly when not in use. Onthego or sports mounting: attach a bicycle phone holder or sports camera to rails, crossbars, or plates, adjust the angle with the 180degree clamp and 360degree ball joint for capturing angles. This product provides a stable, flexible mounting solution for cameras, monitors, lights, phones, and action cameras, with straightforward installation and reliable adjustability.