I know it’s weird but that little bit of promo swag had been on my keychain across 4 cars and now my keys are weirdly light. It makes me kind of sad.
Edit: I knew y’all would understand. I’m going to try the epoxy idea on my next day off. Your responses have turned a crummy day into a great one.
I think it’s powder sintered by the looks of it.
It definitely has a non-metallic core going through it. I can’t really tell what is it though. It could also be only the handle is like that but I kinda doubt the bulk of the keychain isn’t some sort of epoxy resin as well.