DennisL sent us a heads-up about this product from Malco — an attachment that turns your 14.4V or larger cordless drill into a metal shear that can handle up to 18-gauge galvanized steel. I’d imagine this would be pretty handy for an HVAC pro, leveraging an already-purchased coredless drill and eliminating a high-cost second tool all in one shot.
One advantage over a standard shear: You can reposition the TurboShear on the drill so it’s upside-down, which could be handy for tough-to-reach cuts.
Though some places want $100 or more for this, we found it for much less, starting at around $70 via Froogle and even $65 from Amazon. It looks like some hardware stores (like DoItBest) carry it as well.