The skymaster combination ladder offers six functions from one ladder it can be used as a free standing ladder single ladder trestle stepladder and double or triple extension ladder it can also be used on stairs by hooking the third section underneath the ladder in the trestle position the skymaster does more than any other ladder dimensions closed 41 x 11 x 022m height as 3 part ladder 97m as freestanding ladder 253 base widthspan x 11 width x 69m height