Adjustable Brass Knuckle Ball Joint 
The Adjustable Brass Knuckle Ball Joint  allows a lampholder to be positioned at any direction and angle up to 45 deg from straight.
Comes with a 10mm female thread in the base and a 10mm male thread on the top.
Please note: The female thread does not have a thread stop, Meaning the male thread that this is to fix on to must not be any longer than 7mm
Male Thread Length: 6.7mm
Max Angle: 45 Deg