Is there a cutting lip on the bottom? I cannot tell from the photo. They look like nose bits or nose augers to me, which have a cutting lip on the bottom. They are used to cut very straight holes across grain. They are typically used by shipwrights, carbuilders (rr), chairmakers, barn buildings, wherever you need a really straight hole across the grain. Based on the single handle and the very long shanks, I would set that is a shipwright's auger set. They are also called pod augers. Anything like that is a variety of a shell auger, as are spoon bits.