Grant Erwin wrote:

This is another one from my neighbor's basement. It looks pretty much like
a screwdriver, except the shank is tubular, about 3/8" OD, with a quick
disconnect chuck on the end. The end of the handle screws off to reveal a
bunch of bits. These are not screwdriver bits. They are like drill bits but
they aren't twist drills. From the end they look quite a bit like a twist
drill but only the end has helical relief. On the sides are two straight
flutes, no spiral at all. The tool is self-twisting, i.e. when you push it
into the work it twists. The only lettering says "YANKEE".

Anyone know what this tool is, and what craft uses it? The bit sizes range
from about 1/16" to about 3/16".

GWE

It's a Yankee push drill, all right. I have one of their screwdrivers too,
this one is quite different. The screwdrivers have external visible helix
grooves, and the push drill doesn't.

GWE