The  Combi  ladder is the ideal 4 ladders in 1 package for use on the job site. This 3 section combination ladder features slip-resistant D shaped rungs, locking bars to provide additional stability and manual thumb operated locking catches to prevent sections separating this ladder. Conversion modes include a stepladder, freestanding extension ladder, stairwell and extension ladder mode. Approved to the latest EN131 standard. For Professional Use.