The Zarges Skymaster Trade Ladder is 6 ladders in 1 can be used as a single, double or triple extension ladder, trestle step, 'A' frame ladder, and used on steps and stairs. The rungs and stiles are made from extruded aluminium sections, which provide excellent strength. Lockable ladder sections and a rigid aluminium locking bar prevent collapsing during use. For added safety the ladders are fitted with anti-splay Perlon straps. The replaceable 2-component plastic end caps ensure positioning without risk of slipping and at the same time provide firm seating in the stile. Skymaster quality stile guides encompass the whole stile with plastic inserts for smooth handling. Rung locks are bolted in so that they can be replaced. An extra wide stabiliser bar is included on the bottom section. A wall wheel assembly is included at the top of upper section. All sizes conform to EN131 professional standards, with a 150kg rating and a 10 year guarantee. Please note due to EN131 professional standards, 41542 and 41544 can only be used as a 3-part extension ladder or an 'A' frame ladder.