This lightweight aluminum tube mounting coupler comes with a ball designed for mounting additional accessories on the DJI Ronin series, Freefly Movipro series or any other items with a 25mm-30mm tube. EVF (electronic viewfinder) Mount, Ball, Cold Shoe mount or any accessories that come with 1/4in or 3/8in adapters can be mounted to the 1/4in and 3/8in screw holes.