I dunno if they'd be considered metal by everyone. I never really hear them mentioned in metal circles, but I have always considered them essentially a doom/hard rock band with pretty overt cues being taken from Black Sabbath and Alice Cooper.
Anyway, the symbol originally came from a crappy t-shirt I printed in '05 for a graphic design class. I cut the shape out and sewed it onto a piece of scrap denim to make this patch. The white thread border was both an aesthetic choice and an attempt to keep the denim from fraying too much.
It's migrated around on my vest over the last few years, but I took it off to place other patches and I haven't really found a way to work it back in yet.