AC102003 ALUM LADDER JACK LONG | The AC10-20-02 two rung long body ladder jack is designed for quick field adjustments. The platform clamp system clamp secures the platform to the ladder jacks and ties supporting ladders together to help secure an entire ladder jack system. The lightweight but sturdy jack mounts on either side of the extension ladder. It accepts stages up to 20 in width. Recommended for use with 300 lb Type IA and 375 lb Type IAA extension ladders.