I think it's an old carbon battery core. I've found a few of them where I metal detect.View attachment 2047481 View attachment 2047482 View attachment 2047483 View attachment 2047484 Hi, I found a bunch of these down by my lake. They’re solid rods, not sure what they’re made of. Almost looks like a core sample. They fit into these plastic bases with a metal center (this one is cracked). Please let me know what this is. I’m so confused.