RIDGID Fiberglass Extension Ladders - TYPE IA HEAVY-DUTY (300 LBS.) Extra heavy load bearing capacity up to 136 kg. Outside slide guides Steel swivel safety shoes with metal shield Mar-resistant rail end caps Anti-skid and ruggedized D foot bar, solid and anti-skid cast aluminum safety lock All-weather high strength polypropylene rope ensures smoothness; hanging pulley device provides smooth extension Provided with ruggedized toe clip and anti-skid base