Description: Used to attach a monitor or small light to your camera while shooting a video. This ball head has a single lock knob for fast and safe operation. Double ballhead magic arm forDSLR,monitor, LCD, lights support, rods mount. It can be placed in many positions and DSLR rigs, Camera shoulder support, Camera Stabilizers 1/4" thread on each side of arm, mounting to any other accessories with 1/4" threaded holes. Coming with rubber gaskets on each side to make it non-slip. Specification: material: metal Length: 85mm Package Includes: 1x Double Ballhead Mount