This VEVOR detachable dock ladder is made of aluminum alloy frame, ensuring security, stability, and better corrosion resistance. The 4in widened pedals provide strong 350lbs load capacity and friction force. There are 3 different sizes of ladders with 3-step, 4-step, and 5-step for your option. It's widely used in docks, sea boarding, and swimming pools. | Vevor | | Dock Ladder,Removable 3 Steps,350 lbs Load Capacity, Aluminum Alloy Pontoon Boat Ladder with 4'' Wide Step & Nonslip Mat | Silver | Best Buy