"DOUBLE AxIS SPRING SYSTEM Features the new Double Axis Spring System, which consists of a built-in 3.30 lbspring for both the front tilt and side tilt movements. This innovative solution, borrowed from the video industry, helps to move the camera smoothly while framing the picture, as it helps to balance some of the camera weight. In addition, it absorbs the shock to bodies and lenses when reaching the end stop of the head movement. If you are using an extremely lightweight camera system, you can simply turn off one or both springs by the 2 separate control knobs. DESIGN In photography, image is everything and Manfrotto kept this in mind with the 808RC4. Manfrotto modernized the overall shape and rounded many of the hard edges to produce a fresh and elegant product. The new handles are designed to fit comfortably in your hand, even taking into consideration the size of your fingers. We are also using a new coating on our quick-release lever that is more durable and scratch resistant. This model replaces The 329RC4 Mode|Ergonomic design handles for superior grip|On/Off selector for balance spring Side Tilt and Front Tilt Movement|Safety Spring"