This is an proffesional 11""artictulating arm with rod clamp perfect for mounting your hd monitor,led video lights to DSLR RIG,Rail system, rail support. * This Single Rod Clamp will allow you to attach any 1/4" accessory to any single 15mm rod. Ideal for mounting monitors and handheld recorders on your shooting rig. * 1 x LargeArm V1 articulating arm * 1 x Single Rod Clamp - 15mm (2 thread)