The Side Arm mounts on the center post of tripods with a 3/8" thread.
The durable, rigid 20" aluminum tube slides back-and-forth to reposition the attached accessories and locks
along with video light or studio light on the opposite end.
Two 3/8"-16 side mounts allow you to attach different accessories such as a tripod head for your camera
It allows easy shoot straight down to the ground without having to get the tripod column and legs into the picture.