The Hydrostat is the most advanced ball head, designed to meet the demands of professional photographers for a lightweight, but at the same time heavy duty load capacity head. The 468MGRC3 has similar features to the standard range of ball and socket heads, with independent pan and tilt locks, 360° pan and +90° / -90° tilt movement - but employs a revolutionary friction and locking mechanism. An inner oil chamber is compressed by turning the locking knob, exerting even pressure on the whole of the underside of the ball, which ensures sturdier locking and higher capacity... for camera and lens loads of up to 10kg. This head has a magnesium die cast body, a 2" Teflon coated aluminum ball which combined with specially designed tension surfaces provides movement as smooth as silk. A calibrated adjustable tension control allows you to preset the ball tension to suit your camera weight and give you fingertip control. The oversized lock knob is easier and quicker to find and turn. The second benefit of the liquid-based locking mechanism is that it all but eliminates unwanted movement during the locking phase.