M11-027B Meking Wall Plate 120mm receiver

Constructed of steel, and finished in black, this Meking 120mm Baby Pin Wall Plate is a handy accessory on any type of production set.
All that's needed is a flat surface for its base and optional screws to mount it to walls, ceilings or floors.
It's often gaffer-taped to apple boxes or the floor to temporarily support lighting equipment at a very low angle.
The industry standard 5/8" diameter pin fits a very wide variety of lights and other gear with a matching 5/8" receiver.