Frank. It works on Class D as well for when your aluminum block catches.
I didn't know that, but I wouldn't even try to put it out if the block started burning. If I get out unscathed, cool.

If I can keep the interior or a short under the hood from going up in flames, even better. Anything else is beyond my capabilities. I probably know
a little more than the average person about putting out fires. And I know I don't have enough fire extinguishers to put out an engine fire in my truck or any fire in someone else's vehicle once it gets going good. It's one of those situations where seconds count and someone can't show up a couple minutes later with a fire extinguisher to save the day. Like when when you need a gun right now, not in a few minutes.