Exactly what it is for... To cut through sheet metal like a can opener cuts through cans...
Also used to turn gas valves...
I brought it up to work here during Hurricane Rita, "Just In Case"tm
I brought it over to a friends house and let him use it to remove a ROOF(!!!) that fell in his yard!!! It came from a trailer three lots away!!! And there was no room to drag it out of the yard, so he had to cut it up...
Worked well, but it has NO edge now... And it is no longer mirror finished.

... I have a LOT of work to do to it... But it is amazing how it 'sings'!!!
Here is a very funny review of my axe...
http://www.epinions.com/content_92678819460