The Zarges Skymaster Industrial Ladder serves six functions in just one ladder. It can be used free-standing, as a trestle step, single, double or triple extension ladder, or even a stairway ladder. It is extremely rigid with high-strength ZARGES quality flanged connection between rungs and stile. Rungs and stiles are made from extruded aluminium sections, which are provide excellent strength. The ladder has two rigid aluminium locking bars for maximum stability. Its top and middle section have rung hooks and positive operation locking tabs. Replaceable plastic end caps ensure firm positioning without risk of slipping and at the same time provide firm seating in the stile. Strong nylon restraint straps with a sewn-in fixing tab prevent splaying. The Skymaster's 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 assemb