Oh, Zaz, but you're totally ignoring the very unique quality of these little wonders of the world! I mean, how many screwdrivers have you seen that you can physically turn the handle, while the actual screwdriver remains completely stable; doing absolutely NO harm to the screws (such as turning them so they're too loose or anything crazy like that)?????
You can turn those suckers 'till the cows become steaks, but your screws remains safely unaffected. I mean, come ON!!!
You can't put a price on safety, after all.