The 71022 is a genuine InSinkErator Shredding Plate. The InSinkErator 71022 rotates inside the disposal to grind up the contents. It is recommended to either refer to your appliance service manual, contact your appliance manufacturer, or contact a service professional to validate the needed part number for your appliance prior to purchasing. The InSinkErator 71022 Shredding Plate fits the following brands of garbage disposers: Kenmore, Insinkerator The Shredding Plate is also called shredder rotor.