Extension and Retraction Design: Compacting from handy 3.2ft to 16.5ft. With inward slide latches, you can adjust the height of the ladder rung by rung in 15.7inch increments to fit specific requirement such as repairing ceiling lights, hanging picture frames or painting walls. Safe and Compact: Comes with 2 Hooks for secure fixing. Featuring durable aluminum design, industrial-grade height-locking latches and solid anti-slip rubber-tipped feet on the bottom of ladder step. The telescopic ladder is approved by safety standard EN131.