UFP TOP LOCKOUT UPGRADE - This lockout option allows trailers to be backed up over soft ground or up inclines without fully engaging the brakes - The lockout is designed to dis-engage when the trailer is pulled forward after backing up, therefore it must be manually reset prior to each time you back up your trailer - Zinc plated for corrosion resistance - Easily installs and replaces the existing plastic outer member cap - Quick clockwise turn of the cap dis-engages brakes, keeping actuator from surging - Works with UFP Brake Actuators