Your technical comments are fair but here's the history: fiveish years back a friend of ours (Divide) got some metal cards and Melvin liked them but wanted some

Your technical comments are fair but here's the history: fiveish years back a friend of ours (Divide) got some metal cards and Melvin liked them but wanted something a little different. Jeni, Mel and I came up with the lock picks. Kevin's cards are a derivative with the picks shortened to fit more contact info. If you wanted to build a more robust version you could use thicker steel and replace the chemical etching with laser. I think a simple cipher machine or something like that would be a cool next step.