Constructed of thick diamond plate aluminum, fully welded seams and a reinforced dome style lid with high quality foam weather stripping; the Ultima storage box is hardworking and reliable. Designed with a full length piano style hinge, adjustable lid stickers, and twin gas struts providing a smooth a self-rising lid upon opening -even in cold weather, the Ultima provides years of dependable service. Boxes include a deep molded tool tray that provides storage for small items and sits above the ledge, allowing for maximum storage inside the box.