SMALLRIG Multi-function Double BallHead with Clamp & 1/4" Screw 1138 is a Multi-Function Double Ball Head with bottom clamp and 1/4" screw. It can Mount Monitors and led Lights to DSLR, 360º Articulation. 1/4"-20 Screw on Top. It can be mounted directly to a DSLR or camcorder, and allows for the attachment of a full array of video accessories. Used to attach monitors or small lights to your camera while shooting video, this ball head has a single locking knob for fast and safe operation.