It's really difficult to put two fine a point on this, because there are multiple tools that are basically vital to my job. I would say that most of my job can be done with a simple Phillips screwdriver, however the impact gets it done like 10 times faster and without fucking up my rotator cuff.
I have this really Kick-Ass flashlight which is helpful, I could probably go on for a while. I need to drill things so,.... Hmm
I think there are limits in the other direction, people in the United States seem to have really shite vocabularies