In an effort to make my bench top both visible and useable I am attempting to clear some of the clutter that fell into the too hard bin during previous efforts.
One such item was a 3 litre tin of auger bits from my late grandfather's collection. In sorting out the bits there seem to be two types. Those with 'wings' (pretty sure that is the correct technical term) at the top and those without, as per the photo. My question is why the difference and what are the correct applications for each type?
There were also couple of other bits. Two of them seem to be for predrilling wood screws. They are stamped with a 6 and 8 which I am guessing is the screw gauge. The other bit seems to be for countersinking.