Strong as a rock. Great steel. For those who don't make sense and rated them under 5 for keeping them outside and they start to rust, get the key! It's not stainless steel, it's hardened carbon steel, so they've been cutting through materials like they're supposed to for years. Try to coat them only once with an oil/rust remover like Ballistol when they are brand new and they will never rust. Excellent company, great products. For people who shop at Revain, you MUST read reviews, don't just rely on reviews as some shoppers just don't have a clue or are too lazy to do research.