This is the Mole 18" Junior Offset Extension Arm. Offset arms are useful in situations where a light on a stand cannot be placed as close as desired to a subject or needs to "see" over an obstruction. Be aware that offsetting a light also offsets the weight, usually necessitating the use of a sandbag or counterweight to prevent tipping.
This 18" Junior Offset Arm provides 18" of distance from the stand and has a 1-1/8" receiver at the stand end and accepts a 1-1/8" male stud for the offset light at the other.
In the Box
Mole-Richardson Mole 18" Junior Offset Extension Arm