I don't think they're aluminum. I'm pretty sure they'll eventually rust. I've used them last year also, and they haven't started rusting yet. I only get to fish on Erie about six times per season, so with such infrequent use, they'll last a few years before they get too rusty. I was unaware of the pilgrim releases. After reading this thread, I will probably go that route. $15/doz is a price I consider reasonable.