The Whirlpool WP8547168 Dryer Belt 4 Rib Drum Loop is an important component for keeping your clothes dryer running smoothly. It's a rubber belt with four ridges for better grip. This belt connects the motor pulley to the dryer drum, providing the driving force for the drum's rotation throughout the drying cycle. As the motor spins, it turns the pulley, which sends the rotation to the belt. The ridges on the belt ensure that it grips the pulley firmly, preventing slippage. As the drum spins, your garments tumble freely inside, allowing for excellent hot air circulation and drying. A worn-out or broken dryer belt might cause the dryer to stop tumbling or take much longer to dry the clothing.