I recently bought Self Reliance Outfitter's "case-hardened" skillet and used it for over a month and started noticing pits in the metal. I tried getting a refund and they said the soap I used was "not on the list". If you've ever used salt and oil to cook with, who hasn't?, I'm pretty sure that's what did it. I just told em they were failing and I wanted a full refund. They told me Simple Green will harm "case-hardened" steel. Avoid any skillet claiming to be case-hardened, and no, I will never buy from those crooks again. If you want a decent carbon skillet chefknivestogo has one but it aint cheap. Just a heads up.