The Roof Zone Corner Stabilizer is a great tool when working on corners and flat surfaces. This product keeps the ladder stabilized when in those areas. They will work on any aluminum ladder of all ratings. With this product, you will be able to feel more comfortable on a ladder in those cornered spaces. Provides stability when working on corners Stand off on flat surfaces is 18 Comes with rubber caps & hardware Made with light weight aluminum 40x20x10 inches