Ⅰ. Multi Purpose: Fully Extended : 633cm*48cm*8.5cm, Space-saving Storage: Folding（109cm*48cm*8.5cm), Number 15 steps， Step spacing: 40cm. Suitable for working on a wide range of domestic roofs. Ⅱ. Come With Ladder Roof Hook Kit : Convert your extension ladder into a roof ladder,quick to fit on the ladder and secures ladder on the roof. Ⅲ. Lightweight: Approx.: 16.3kg ( 36lbs), The ladder is made of Aluminum, build is sturdy. Easy to carry - the telescopic Ladder that is versatile and portable ladder for both indoor, outdoor use house building maintenance, office, warehouse, bookshop ,Library use. Ⅳ. Easy Operate: Extension and retraction, for extension, pull a section up, hear the "click" sound, confirm both left/right locks are in place; for retraction, unlock one step and step, do not put your hand in the Step spacing avoid clip your hand. Ⅴ. Security Featureses-- Designed （EN131 Certified） safety in mind, come with Ladder Roof Hook Good secures ladder on the roof. Guarantee your safety with anti-slip rubber foot.