The word that came out of my mouth when this image opened on my screen: "COOL!!!"
Here's the lug nut, they also have gears. Like all other bookends, they hold up your books. These just do it in a hipster industrial way.
This A frame bookcase it one that we really like. My boyfriend likes the "leaning shelves" look and I just want something simple. This looks like it could be just the one!