This is an proffesional 11""artictulating arm with 15mm rod clamp * It is perfect for mounting your hd monitor, led video lights to DSLR RIG ROD Rail system, rail support. * Durable construction with a locking control knob to release or engage the tension, this articulating arm simplifies the mounting, placement and adjusting any on-camera lighting and other accessories. * Ergonomic design, one knob locks all postions. * It comes with the shoe mount and it fits directctly on your camera shoe mount And it can be mounted to 15mm Rod Rig System with the rod clamp..