Here is a goal: To tighten a wrench.

Which way makes more sense to accomplish this goal?

Options are: +You need to get a different wrench from the tool box. You'll have to get one that's already tight enough. +The spinning gear adjusts the wrench grip. You can make it tighter or looser as needed.
The spinning gear adjusts the wrench grip. You can make it tighter or looser as needed.