The D1508-1 is an 8 ft one section aluminum straight ladder with a duty rating of 300 lb. The exclusive ALFLO® rung joint means TWIST-PROOF® performance every time. The side rails are extra heavy duty I-Beam rails and the aluminum TRACTION-TRED® D-rungs are slip resistant. The rugged shoe rests flat or is held in spur position with the SHU-LOK® feature for use on hard or penetrable surfaces.