FramePro Mini-MFSA Roll & Fold Scaffolding Two half platforms for mulit-level positioning on three rungs Very light, made of tube aluminum, remove the trays and it folds up for easy storage or transport Non-stackable, stand alone units with tool tray, perfect for painters, tapers, finish carpenters 400-pound capacity, can be used as a transport tray for bulky items Four 4-inch wheels thread into the legs, lock in place, also lock from swiveling