The SmallRig NATO Clamp attaches to any NATO rail, providing 1/4"-20 and 3/8"-16 threaded mounting holes. It features a bright red locking lever that is easy to locate in dim lighting conditions. This NATO clamp allows you to mount a small camera/monitor or wireless receiver onto a NATO rail. In addition, an optional cold shoe mount can be attached to the clamp, enabling a way to mount additional accessories, such as light, microphone, or other cold shoe accessory.