Werner 20 ft. Fiberglass Extension Ladder is an extra heavy-duty professional use ladder designed for durability and safety. It features external guides at the top of the base section that securely interlock the rails, ensuring stability during use. The base and fly sections separate easily, allowing the base section to be used as a single ladder. Internal guides on the bottom fly section further secure the rails for added safety. The ladder is equipped with slip-resistant Traction-Tred 1-1/2 inch flat D-rungs for secure footing. It includes a durable rail shield bracket and shoe with Shu-Lok slip-resistant pad and spur plate, along with the exclusive Alfo rung joint, which provides twist-proof performance. The fiberglass rails are electrically non-conductive and finished in bright orange for visibility. This model also features a rope and pulley system for easy extension and retraction. To maintain its strength and longevity, fiberglass ladders should be stored away from direct sunlight, as ultraviolet rays can weaken the polyester resins over time. Model Number: D6220-2