Re: stuck screw
The thing I like about mine is that the flat blade bits that came with mine are different sizes, including a wide one that fits the full length of the slot in the screw and rather than the normal sloped tip that most screwdrivers have, these insert bits have parallel sides to the bit and that makes a whopping difference in doing what you're doing.....to the point where you may not have to smack the end of it to get the screw out (impact function).
Mark