still the best driver bits i have found so far are the ones i got at the marine supply store
they are not cheap but they are the most stout think they are vanadium
the ones at the hardware are mostly crap and lately it seems like i have been burning thru them
none of the ones at the hardware specify the material
think they have figured out how to make planned obsolescence driver bits to sell more
these bits from the marine supply are made by a fastener manufacturer
anyone have a favorite bit brand