Designed for safety, the Werner 16 ft. Fiberglass D-Rung Extension Ladder is built with non-conductive rails that make it ideal for working near electricity. with a duty rating of 300 lbs. the ladder offers long-lasting durability and security, featuring the exclusive ALFLO rung joint for twist-proof performance. Offering versatility for a variety of jobs, the base and fly sections separate easily so you can use the base section as a single ladder. The durable rail shield bracket and shoe help protect the bottom of the rail and the fly section rails are pre-pierced at the top for easy field installation of accessories. Additional features include the slip-resistant, TRACTION-TRED D-rungs, interlocking side rails and dual action feet that swivel easily for use on hard or penetrable surfaces.