As the original manufacturer of adjustable articulating ladders, Little Giant Ladder® has perfected the engineering of this revolutionary ladder system. These fiberglass and aluminum ladders can be configured to work as a traditional A-frame, a 90-degree ladder (where one side is straight-vertical so the climber can work forward-faced against a flat surface), and an extension ladder. Most of these ladders also have the ability to double as a scaffolding system with the optional trestle brackets and adjustable scaffold plank, allowing for a wide working area without having to move a single ladder back and forth. These ladders also have a large variety of accessories made to make your life easier, so be sure to check those out as well. When it comes to ladder safety, no one does it better than Little Giant Ladder®. Stay safe and buy one today.