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