Product details:

The D1512-1 12ft One-Section Aluminum Straight Ladder has a duty rating of 300 pounds. 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.