The GF2 Gimbal Head Flash Doubler from Pro Media Gear is a flash adapter that is compatible with the Katana GK and GKJr Gimbal Heads. The flash adapter clamps to the top of the gimbal's rail and places two flashes at a higher vantage point, which eliminate shadows when the flashes fire. Moreover, the adapter also mounts on other gimbal heads that have the same Arca-type dovetail rail. The Flash Doubler stays in place when you are switching out a camera or lens, and laser-engraved centering lines help to position the adapter vertically on the gimbal's rail.