Stay away from the aluminum versions
This is a great piece of kit. I've had mine for a month and I don't think I could go back to a regular wallet - carrying something this much less volume is too much to pass up. However, Alu7075 really isn't hard enough a metal for something like this. I should have known before I bought, but I wanted to cheap out (my own fault...). Anyways, after a month of use, there a lot of scratches and gouges on the aluminum, and if any more material starts coming off the corners its going to take the corners of the cards i wanted to protect in the wallet away with it too. I'll probably look at a replacement ridge in the future, with steel or other harder shell.