Vulcan Ladder USA 3600735401986540 Stepladder Multi-Task Alu 17Ft, 17' MT The most versatile ladder on earth - 23 possible configurations with height adjustments in one feet increments Step ladder, extension ladder, stairway ladder, wall ladder and scaffold frames - all in one compact design Patented no pinc h hinge for ease of use and safety Wide base for added stability Built from strong aircraft grade aluminum