Tried a treet Super Power Carbon Steel blade in a Rockwell this AM. I think these are made in Pakistan. The envelope has that yellow lighning bolt on it. It felt like the sharpest blade I've ever put against my face. You know when like 1/2 stoke in and you're already modifying your technique gently holding the razor to have the slightest of contact. Great shave though. Just takes some getting used to. Amazing though. Thankfully no nicks, cuts or irritation of any kind.