The claim he failed seems like hyperbole. He couldn't find an existing manufacturer for chainmail in the US but this is a fairly trivial and niche thing to create, and is more a reflection of how uncommon it is for people to need that specific type and size of chain mail than it is that the US is incapable of making it. The other part is from Costa Rica only bc he hasn't yet made the injection mold for it, like he did for the handle itself.