The D5920-2 20 feet fiberglass extension ladders feature a rounded rail for improved ergonomics while climbing and carrying. The non-conductive fiberglass rails are interlocking and the exclusive Alflo rung joint means Twist-Proof performance every time. The Traction-Tred D rungs are slip resistant. These extension ladders are lightweight for transporting and maneuvering yet still have a duty rating of 225 lbs.