Security System - We believe that for a multi-purpose ladder, safety is the most important thing that cannot be ignored. Each section of our 14-foot ladder has a safety lock to ensure that each section is not accidentally retracted after being extended during use. Quality Material Selection - The main part of this telescopic ladder is made of thickened high-quality aluminum alloy, which is superior to the thickness of ordinary aluminum alloy, with more materials and more durable. You will know that the thicker aluminum ladder is more stable under the same bearing capacity.