LEM grinder knives are made to LEM's stringent standards for hardness and quality. LEM carries stainless steel knives. Remember when changing your knife to change the plate at the same time for optimum performance. Stainless Steel: A better option than Carbon, as Stainless Steel is a stronger material than Carbon. Made to LEM's stringent standards for hardness and quality Highly resistant to rust Change grinder knife and plate at same time for optimum performance