Black Wooden Screw Thread Ceiling Mount for Studio Surveillance System

This product include 4 items black wooden screw and 4 items white wooden screw,you put in on the picket desk different wooden materials,have one 1/4″-20 thread to connect equipment.
Include 4 items black wooden screw and 4 items white wooden screw.
Have one 1/4″-20 thread on the highest.
The mini ball head can 360 swivel.