Featuring a crab-shaped clamp with a maximum opening of 2.1", this Crab-Shaped Clamp with Ball Head Magic Arm from SmallRig can be attached to the 1.2" crossbars of the DJI Ronin and FREEFLY MoVI Pro gimbals. The articulating magic arm with dual ball heads provides a 1/4"-20 mounting screw for LED lights, on-camera monitors, and other accessories up to 3.3 lb. Pads on the crab clamp ensure your equipment remains damage-free and provide additional security.