Enjoy unmatched feeling of stability in any situation thanks to aircraft-grade aluminum, the wide-flared legs, and the highest quality construction * Use the model in A-frame, extension, 90-degree ladder and three different scaffolding positions. Buy one ladder to do the job of five. * Use the right ladder for the right job every time and avoid 95 percent of all ladder-related safety issues. * Reach some of the toughest areas such as the space above the staircase, vaulted ceilings; and use your ladder over and around obstacles. * The Alta-One Model 17 is the lightest 17-foot articulating ladder on the market, and is OSHA and ANSI rated to hold up to 250 lbs.