This high quality Gitzo Ball Head is a brand new design of their proven off center ball head line. Incorporating a new Spring Assisted Double Locking system you will get smoother movement and more effective friction operation. Everything on this head has been reengineered for top notch operation. This magnesium head is now 15 to 17% lighter than earlier models it will be a great choice where weight is a consideration. The know design has been changed for better ergonomics and weight reduction, and the locking mechanism attached to these knobs is 3x stronger than in previous models.