This extension ladder from Werner comes with slip resistant feet for added stability whilst working. It's light 10.8kg aluminium and plastic construction is extremely durable as it can hold up to 150kg. It extends from it's storage height of 2.97m to a maximum height of 4.91m. The D Shape slip-resistant rungs have been designed for additional safety and comfort making it perfect for accessing higher harder to reach areas of the home such as 1st floor windows gutters and roofs. The manual thumb operated locking catches means the rungs lock automatically when the ladder is extended.