Since Facom acquired the Bost factory in France all pliers and screwdrivers are made there. You can find also cheap stanley branded pliers and screwdrivers of the fatmax series and they are the same, minus the handles.
Yes, knipex has some box joints, in precision cutters and really small pliers. And also the pliers wrench. I guess the twin grip and the pliers wrench wouldn't work if they were lap joints
You didn't ask me but definitely the backdrag isn't low. I'd say medium. High backdrag I consider a wurth bit driver that you must hold the bit in the unsrewing because it screws back in! Low backdrag I consider koken