Kupo KG037311 Double Socker Arm with Knob

Kupo Double Socker Arm with Knob is part of a modular system that allows the Knuckle to accept ball joints on either side that in turn accept accessories from the system. The Knuckle allows you to secure both optional ball joints with a single knob.

Video Link: https://youtu.be/3ZIkLB9oI0M