A parallelogram design that makes it easy to precisely raise or lower lights without changing the angle of light in relation to your subject. For precise control, the head extension offers rotation up to 360° for unlimited directional control. All angle movements are controlled by a handle located at the pivot point, making it easy to see exactly how the light falls on the subject. The sliding counterweight system easily adjusts for different sizes of lights & boxes. Just slide the weight bags to create the perfect balance & lock them securely. Once you have the balance set for your light source, there is no need to lock the boom into position, simply raise or lower the light to the height required & let go. The boom stays put without locking, clamping or cranking. Perfect large sets & low-angles. Features calibrated angle indicators on the height & rotating head movements. Measures 2.9m (9½') overall, has a 1.8m (6') reach with a standard 46cm (18") head extension & is supplied with two counterweight bags. For longer reach, 61cm (24"), 76cm (30") & 122cm (48") head extensions are available. Measures 1.5m (60") unassembled & weighs 7kg (16lbs). (Stand not included.)