What is the maximum load the pliers wrench can withstand?

Our KNIPEX pliers wrenches are hand tools, so we have aligned them to the loads created by hand.
We consider the maximum loads that can be generated by hand to be those in which a user loads the pliers wrench with their muscle strength or body weight (by propping up or hanging on it). We determined our reference values with a 140 kg person.
The pliers wrenches are designed in such a way that they can withstand multiple loads without damage.

Pliers wrench

86 05 250 T
Pliers wrench
Pliers and wrench in one tool