The Mastercraft 21’ Telescopic Aluminum Multi-Task Ladder, Grade 1, can accommodate a variety of climbing needs as well as more demanding applications Design allows use in 4 different positions: twin stepladder, extension ladder, stairway stepladder and as 2 scaffold bases Once in position can adjust up to 34 possible configurations in 1' (0.3 m) increment height adjustment Extension ladder adjusts to the exact height required Stairway ladder features multiple positions, and is good for uneven ground Scaffold position uses multiple working heights, and separates into two scaffold bases Designed with a wide base for added stability and a heavy-duty aluminum construction Portable and compact for easy storage Positive safety locking mechanism ensures safe use CSA Grade 1 Weight capacity: 250 lb (113.3 kg) Size: 21' (6.4 m) Ladder Weight: 39 lb