Gitzo Center Ball Head Series 3 QDCenter Ball Head Series 3 QD is a 1. 7 lbs ball head with panoramic movement that gives you full 360 rotational freedom and 90 +40 front and lateral tilting. It is supplied with the Arca Swiss compatible Gitzo Quick Release Plate D but also fits with all of Gitzo's D profile plates and other Arca Swiss style plates from different manufacturers. Ideal for Series 2 and 3 Gitzo Mountaineer tripods and most other Gitzo Series 2 and above tripods.