Imagine a height-adjustable step ladder that doubles as a 19-foot extension ladder--or transforms into convenient scaffolding trestles--yet folds to a compact storage height of just 5' 7". We also have a slightly smaller, 15' model that stores at an even tighter 4' 8". Easy-to-use hinges and lock assemblies allow you to convert either ladder system into any of a number of configurations in seconds. Constructed of heavy-duty aluminum to last for years. Hundreds of applications: around the house, docks, stairs, tree pruning and more.