What Does The Numbers On A Drill Mean (Clutch Setting)?

The numbers on a cordless drill is for the drill clutch setting.
The clutch setting indicates how much power you want the drill to drive into the screw before the clutch disengages.
A lower clutch setting means less power.
A higher clutch setting means more power.
The clutch helps you apply the right amount of power when drilling, so that the screw does not get to deep or don't go go in at all.