Amarr KnockOut doors are versatile, impactable doors designed for facilities and busy loading docks that incur moderate panel and moderate to severe track damage, and are a lower cost solution than frequently replacing damaged dock doors. They are designed to flex and withstand damage to the door panels and track when impacted. All Amarr KnockOut doors feature heavy-duty retractable plungers that allow the door to release from the opening upon impact.