The Whirlpool WP40111201 Drum Drive Belt for Dryer helps keep the drum turning smoothly during each drying cycle. Designed to transfer power from the motor to the dryer drum, this belt supports consistent rotation so clothes can tumble properly as they dry. It is made to fit compatible dryer models and can serve as a replacement for a worn, stretched, or damaged belt. Replacing a faulty belt may help restore normal drum movement and reduce interruptions caused by slipping or broken components.