Luisladders Oshion Aluminum Telescoping Telescopic Extension Ladder 330 Pound Capacity (16.5 Feet) Upgrade Stability Type. Unique Extend and Locking Mechanism with Thumb Buttons Clicks Smoot. Every section is designed to open and close safely, without injuring fingers. SAFE AND RELIABLE: double grip handles on every rung guarantee your hands in right position to avoid pinching; bottom caps and angled feet, easy to secure the ladder to wall and floor; protection spacers avoid bumping and friction.Certificated To European Safety Standard EN131; Max Load: 330 lb. PORTABLE AND CONVENIENT: lightweight and compact size, easy to transport and store; a heavy duty closure strap secures the ladder firmly, easy to carry it with one hand. Great for Home/Building maintenance, Washing window, Exterior/Interior Decorating, Painting etc. 4-way combination ladder system. It can be used as a telescoping ladder, twin stepladder, stairway stepladder, and as two scaffold bases. Heavy duty strap to fasten up for better storage. Skid proof design. Safe and stable pedals, in compliance with skid resistant design standards. Attention: Make sure each of the steps FULL EXTENDED when use it as A Fram ladder