Cool-Ballhead-V1 is a Multi-Function Double Ball Head on both ends with shoe adapter and 1/4" screw. Cool-Ballhead-V1 can Mount Monitors and led Lights to DSLR, 180o Articulation. 1/4"-20 Screw on Top.It can be mounted directly to a DSLR or camcorder's shoe mount, 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. The best load<=1.5kg