1.7 dovetail rail which allows NATO-compatible accessories to be mounted on a camera cage or cheese plate - Space Grey
This 1.7 NATO Rail fits on your camera cage or cheese plate for securing NATO-compatible accessories such as handles clamps and articulating arms. Accessories can slide along the length of the rail and when it's time to pack up disengage one of the spring-loaded pins at either end of the rail and slide your accessories off. 1/4-20 mounting screws and an allen key are included for installing the rail.