When you need industrial-strength, only one ladder will do—the Little Giant Type 1AA. It’s government rated to a 375 pound rating, so you know it can stand up to even the most demanding applications. The Type 1AA gives you the advantages of traditional A-frame ladders, extension ladders, stepladders and even scaffolding—all in one convenient package. The Little Giant is designed to be the safest ladder on the planet and can be used safely on stairs, ramps, curbs, docks or other uneven surfaces. The Little Giant is made of heavy-wall, 6005-T5 aluminum, the very same material used in aerospace construction. When you buy a Little Giant, you’re not just getting one ladder; you’re getting 24 different ladders combined to make the world’s most versatile ladder system. The Model 17 has a step ladder height of 4 ft. and adjusts up to 7 ft. in 1 ft. increments. The extension height is 9 ft. & adjusts up to 15 ft. in 1 ft. increments. This ladder also stores in 4 ft. 7 in. of space.