Out of the box, this little ladder doesn't look like it's going anywhere. But start telescoping it and you almost can't believe your eyes. It extends to 12-1/2 feet from its closed height of 2-1/2 feet; plus, you can use the ladder in any of its 1-foot increments. Stainless-steel spring-loaded bolts inside the rungs lock into place as you extend the ladder. The rungs are made of processed aluminum, and serrated treads feel strong and secure under your feet. When you're done, you just tug on the locking rings, collapse the rungs down, and walk away with a 2-1/2-foot, 23-pound ladder under one arm. It takes virtually no space to store--put it under a bed, in a closet, in a car trunk--and totes anywhere