This sturdy Kwik Release ladder is manufactured from 1″ square aluminum tubing, and with the included Kwik Release hardware can be removed and reinstalled in seconds. This feature, along with the angled design makes it ideal for pontoon boats as well as docks. The ribbed treads, make for sure footing and the angled design makes it easier to climb, as it is more like walking up normal stairs. Easy to assemble with stainless steel hardware included. Rail Height: 18″ above the dock - Distance to first step: From dock surface, 9-1/8″ & 11″ - between steps. Steps: Are 5-1/4″ deep and 16″ wide. Capacity: 350 lb. (159 kg).