The gitzo gh5381sqd series 5 qd systematic ball head is specifically designed to fit into the shoulder of a gitzo systematic tripod and allows a camera to be mounted very close to the top of the tripod for optimal support and lets the camera be levelled or angled accurately with 28 degrees of tilt the systematic heads are solid ultra stable and allow smooth fluid adjustments of your longer and heavier zoom lenses ideal for sport wildlife and action photography the gh5381sqd ball head feat