New Prover Universal Umbrella FlashBracket Large
The umbrella bracket has a spigot mountable fixture at its base. There is a large lockable screw on the side for maintaining the tilt position. There is a hole in the centre for inserting an umbrella and a locking screw for holding it in the desired position.
The bracket is used for attaching flashguns/speedlights onto lighting stands with a spigot mount on top. These are popular items amongst the strobist community where the flash is used off the camera.