The Aluminum Marine Battery Holder Tray holds your deep cycle marine battery securely. The tray fits most boat lifts found on the market today. Battery holder trays prevent damage to your watercraft, battery, equipment and passengers. The aluminum tray attaches to an L-shaped bracket. The bracket then clamps or screws onto the square tube frame of the boat lift. Two stainless steel clamps and hardware are included for attaching the tray to your boat lift uprights. Installation is quick and easy. Deep cycle marine battery sold separately.