Extension and Retraction Design: The telescoping ladder can be extended from 3.1ft to 16.4ft. With lock latches at each rung, you can adjust the height of the ladder rung by rung in 15.7in increments to fit specific requirement such as repairing ceiling lights, hanging picture frames or painting walls. Safe and Compact: This extension ladder comes with 2 detachable hooks for secure fixing. Featuring durable aluminum design, industrial-grade lock latches and anti-slip rubber feet. The telescopic ladder is approved by safety standard EN131, Max Load: 330lbs / 150kg.