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. Great for location & tabletop photographers. Measures only 132cm (52") long with a reach of 81cm (32"). Supplied with a counterweight bag, suitable for up to 6.8kg (15lbs), & accepts optional head extensions of 46cm (18"), 61cm (24") & 76cm (32"). Measures 1m (38") unassembled, weighs 4kg (9lbs) & mounts onto any cine-type light stand with a 5/8" female socket.