The D6020-2 20 ft. fiberglass extension ladders have non-conductive side rails and a duty rating of 250 pounds. The TRACTION-TRED D rungs are slip resistant and the side rails are interlocking. The rail shields protect the bottom of the rail and the SHU-LOK shoe pivots easily for use on hard or penetrable surfaces. The exclusive ALFLO rung joint guarantees TWIST-PROOF performance.