1. Maintenance-Free WAKU Quality: rugged stainless steel pins reliably and visibly lock the sturdy, corrosion-proof aluminium hinges.

2. 8 special rivets through the stringers ensures an extremely rigid joint with the hinge.

3. Solid, ergonomically shaped aluminium height adjusters guarantee easy and absolutely safe locking of the required ladder height.

4. Four-folded rung ends remain positively joined to inner stringers even in heavy duty use.

5. Maximum non-slip effect while also protecting the flooring: large corrugated hard rubber foot pads are riveted to the outer ladder stringers.