Originally Posted by Stratmando

Some bit holders have weak magnets. Bits are not usually magnetized? If the same polarity than the bit holder, it would push the bit out.
They won't hold non ferrous screws(stainless, brass, aluminum).
In that case, I put a little Slipstick, (a lube for pulling electrical wire)between the bit and the screw and it holds fine. I have hand screwdrivers that will hold a screw physically. Will see if I can find photos of these 2 types.