The Tristar 30-20 is a lightweight, durable ball and socket head designed for on-the-go photographers who require a fast setup and smooth, silent operation. The large knob on the side of the ball head controls the axis of movement, simply twist the knob for easy positioning of your camera, and then tighten the knob to secure the ball head in place. The ball and socket head holds up to 2000g in weight, measures 9.2cm in height and is easily transportable thanks to its lightweight profile of just 360g.