Davit Master Aluminum Dock Ladders are made from lightweight 1 1/4 inch T-6063 aluminum with 1x2 inch ladder tread. TIG welded. Comes in three styles, Hinged, Slide and Rigid. Sizes range from 3 feet up to 10 feet. We specially reinforce each rung by welding underneath, as well as on each side of the rung. All welds are smooth and precise. We use only high strength cast aluminum hinges with our hinged models. A Davit Master dock ladder assures safe and easy access into or out of the water.