Raw ones and black ones are made out of different metal. All of these will end up black, but I don't remember what we used at the moment. I will ask the next time I go out to the factory.

Attached is a picture of the punch that broke a couple weeks back. This is the one that we use to make the tabs. As you can see, we just strike the metal a bunch of times in dirrerent directions to make each tab. How would you like it to attach to the dash?