The Gitzo Quick Release Series 5. D-profile Adapters offer a way of adding the Arca-style quick release system to a head that doesn’t have a quick release mechanism. The Series 5. D-profile Adapter is supplied with an Arca-style plate (GS5370D), and will also take most manufacturers’ Arca-compatible plates. The camera/plate can be snapped into the head from above, which is faster and easier than trying to slide it in from the side. On the bottom of the adapter there is a 3/8” thread, with a 1/4”-3/8” screw adapter included to convert it to a 1/4” thread.