SmallRig Sony FX3 Xlr Handle Extension Rig MD3490 is designed to extend the length of the FX3 Xlr Handle and add more accessory mounting interfaces. The extension ring is installed at the end of the FX3 Xlr Handle by a 1/4"-20 screw, which can extend the FX3 Xlr Handle back by 30mm. It is ergonomically designed to provide users with a comfortable grip. In addition, the extension rig is also equipped with a Nato rail, which is installed on the top of the FX3 Xlr Handle by two 1/4"-20 screws. It provides more accessory installation interfaces for shooting scenes so that you can quickly install/release monitors, Evf, etc. The extension rig has Cold Shoe, multiple 1/4"-20, 3/8"-16, and Arri 3/8"-16 accessory threads, providing multiple accessory mounting interfaces for shooting. In addition, the Nato rail can be removed and the extension rig can be used separately..