This Estella 348PSM20GRDS safety guard is a direct replacement for the one that came with your Estella dough mixer. Use it to replace a worn or broken part to keep your unit operating efficiently. This wire guard lets you see the mixing process taking place but keeps any unwanted objects from falling into the bowl or coming into contact with a moving hook. This helps to prevent injuries and accidents, and also ensures that your end products are safe and free of contaminants. It's compatible with Estella SM20 dough mixers.