Retractable Telescoping Dock Ladder Revolutionary Design. This ladder can maintain any position just above the surface of the water for emergency use. This outstanding feature allows for emergency access from the water providing a clean step surface, free from growth, shells and other creatures that may cause injury. This ladder may be extended from the dock to provide access to the water or your boat. It retains any position by telescoping within nylon bearings. Strong and sturdy exceeds 500lb. weight test. Five diver type steps extend six feet from the dock surface. Easy and fast installation. All aluminum, non-slip step surface and slides on a nylon bearing for years of dependable service.