These 4 step stable step stools are built to exceed the highest OSHA and ANSI standards. They exceed Type 1A weight handling requirements, greater than 300 pounds. They are made from high quality industrial grade aluminum making them both sturdy and lightweight. They feature deep and wide, no-slip steps and a built in, foldable safety grab bar that incorporates a sturdy positive locking system to assure maximum stability while in use and folds down and out of the way when not in use. It quickly folds away to just a few inches thick for easy storage in small spaces.