This part is the replacement motor pulley for your dryer. The motor pulley allows the dryer belt to run straight while the dryer is operating. If your motor pulley is damaged, your dryer may not tumble, and may not start altogether. A damaged motor pulley can also damage the dryer belt, and it may need to be replaced as well. Be sure to disconnect power from the dryer before you begin this repair. This motor pulley is a genuine OEM part sourced directly from the manufacturer.