The original range pairs this mount with the articulated arm on suitable ferrous surfaces. Mounting performance depends on the surface and load geometry; the historical direct-pull rating is not a safe working-load claim for every setup.
IN YOUR SETUP
Put it to work.
Use a suitable metal support
Pair with the appropriate arm on a compatible ferrous surface when a clamp or stand is awkward. The surface, leverage, and orientation determine the setup; provide suitable retention and do not treat a direct-pull figure as a general load rating.