Sorry for this On Topic post. Skip this if you are only into politics,
religion, and non home repair topics.
In the interests of safety and convenience, there is a better way to
use Self Feed bits (Milwaukee and others) in running electrical wire
and plumbing if you don't have a Hole Hawg or similar monster drill.
Buy a 7/16" socket adapter for your impact driver which will fit the
SF drill shank. The impact driver will walk the drill through most any
wood framing even faster than the monster drill. There is also an
advantage in the compact size of the ID.
Haven't tried this with large hole saws yet, but that is the next