This quick release system is totally new. made from magnesium, it is extremely lightweight & compact. Besides the traditional double safety system, it features a new lever operated locking for increased safety & compactness. It also features a unique advanced system of leveling bubbles. This system means that you can precisely control the leveling of your shoots in any position & condition, in both portrait & horizontal position, with both short & long lenses. The three bubbles on the plate