This is a Clothes Dryer Drum Ring Bearing kit. This is a snap-in, two-piece set. The small plastic clips can wear over time and break. If the glide breaks and is not in place, the metal drum will ride along the metal on the door. The friction will cause noise, could damage the drum itself, and/or start to rip and snag clothing. If you like your dryer, you better put a ring on it.