How Does Torque Apply When Using a Screwdriver or Nut Driver?

[goldfish9776]

Homework Statement

Is loosening and tightening of nuts using screwdriver considered as application of moment??

Homework Equations

The Attempt at a Solution

 

[Astronuc]

I think one loosens or tightens a screw with a screwdriver, while one uses a wrench or nut driver (looks similar to a screwdriver) to loosen or tighten a nut.
https://en.wikipedia.org/wiki/Nut_driver

What is significant between the tip of the screwdriver (or nut driver) and the handle?

One is applying a torque at the head/tip.