This is a stainless steel keychain that works as a bottle opener and is shaped like the outline of the city of Detroit. The hole in the middle is not a lake.
The finish is a dark patina that will hold for several months, by which time it will take on whatever patina your life has given it. There are dents in the surface of it, and you'll add more of your own over time.
If it arrives with a small amount of dark dust, you can brush it off easily, but it will be gone after a single day in a pocket, so a better alternative is to put it to use right away.
All of my keychains are bottle openers, and they work. The designs are tested to ensure functionality.
Check out more of my work at tmapllc.com!