PVR wrote:
I need to cut a 4" dia hole in a 6" dia duct which is installed in
place between the joists. I am considering a circular saw with a
pilot drill attached to a power drill. Perhaps there are better
techniques or tools?
Thanks, Peter.

The best tool is a nibbler. Snips are second. I sure would not try to
use a circular saw.

--
Joseph Meehan

Dia duit