It looks like tayball89 has confirmed what was assumed....it is metal but a very cheap and fragile metal.
As I said, I like the case and will keep it as I think it looks great. I just won't be opening and closing it frequently. I don't see a reason to take it off anyway.
I believe tayball89's post showed that the joint is weak. Makes sense since the only thing holding the two metal pieces together is a pin thinner than a toothpick.
I'm with you on the second point though. I'm going to be careful about closing and opening the case. Also do not see a reason to take it off since it sits nicely on the phone.