Hinderer will replace a blade but it depends on the situation. I will say they do not do it often. Also there are a lot of times where you send something in that they do not have a blade for so you might end up with a different blade on your knife. For example a customer recently sent in a Spanto XM-18 3.5. Rick contacted him back and said they would replace the blade for a fee but he had no more Spanto Blades. He ended up instead getting a Harpoon Spanto blade back on his knife. Customer was happy with the result.