The zarges skymaster trade ladders are extremely rigid with strong connection between rungs and stiles the top and middle section have a rung hook and positive operation locking tab and a rigid aluminium locking bar prevents collapsing during use strong nylon restraint straps with a sewn in fixing tab keep the ladder stable and prevent splaying quality stile guides encompass the whole stile with plastic inserts for smooth handling rung locks are bolted in so that they can be replaced the skymas