I don't disagree with any of the advice,this is just my 2 cents worth of opinion. I use the chuck key as a lever,hoping that it won't provide enough leverage to twist the screw off. If it's stubborn,I find it sometimes works to strike the screw driver "smartly"with a hammer(of course,with the screwdriver in the slot)to "shock" the screw. Sometimes it helps to turn the screw clockwise,then counterclockwise several times.This is sometimes enough to break the rust loose. If you have to resort to an impact driver, you have lost the screw.
Good luck
Mike
Mike,
Good suggestions, I've had good results doing all of what you just wrote.
Steve
PS even using the key of the chuck you can over torque a screw, at least I did.
