This Estella 348PSM8GDSWN guard switch is a direct replacement for the one that came with your Estella dough mixer. Use it to replace a worn out or broken part to keep your unit operating efficiently. This switch cuts off the power source of your equipment when the protective device is turned on or opened abnormally, preventing the running parts from causing injury. This ensures stable and safe operation. It's compatible with select Estella SM series dough mixers.