The zarges telescopic trade ladder serves as 3 ladders in one lean to trestle and staircase ladder only a few actions are needed to convert from one to the other the ladder allows rung by rung height adjustment in all versions and features high strength zarges quality flanged connection between rung and stile the functional robust hinges have automatic locking pins screw fitting and are easy to change the telescopic ladder has economically designed turn and pull handles with plastic coating for