SmallRig Ballhead 2114 is a ballhead with Arri locating pins on the one end.
It is used exclusively used to attach a camera cage or monitor cage with Arri locating points. It prevents magic arm from twisting, thus it increases the stability and security of the magic arm. It comes with a thumbscrew to lock the cage tight manually, or even tighter with the use of the hex spanner. The rubber cushion on the ballhead could increase the friction between ballhead and ballhead clamp, thus ensuring firm locking.
Also, it could replace the ballhead on either end of Magic Arm 2070/2071/2072 for use.