The D716-2 is a lightweight Aluminum D-Rung Extension Ladder with a duty rating of 200lb. The fixed lock allows easy push-up height adjustments. The exclusive Alflo(R) rung joint means Twist-Proof(R) performance, and the mar-resistant end caps help protect the surface ladder is leaning against. Traction-Tred(R) D rungs are slip-resistant, and the side rails are modified I-beams.