Specifically designed for the marine environment, the Uflex AV and AVL hatch lifters feature anodized aluminum and stainless steel construction. They can lift up to 265 lbs. in single actuator applications (530 lbs in dual installations).The AV series has a unique feature that allows the hatch to be lifted in the event of a power failure such as a dead battery.The AVL "Locking Version" is recommended for high performance boats where the hatch could open inadvertently while underway. Includes mounting hardware.