Model: 10103S. 22 ft. A-frame, extension ladder, stepladder and scaffolding in one unit * Safe to use on stairs, ramps, curbs, docks and other uneven surfaces * Rated at 300 lbs. Triple-locking hinge. * Made of heavy-wall 6005-T5 aluminum. Tip & Glide wheel system * Combines 24 different ladders into one convenient ladder system