The 550 pound capacity multifunctional aluminum dolly has 2 -10 inches pneumatic tires and 5- solid rubber no skid small wheels on each side with the capability to lay down horizontally or up vertically. This is ideal for moving equipment, multiple boxes, and being converted from a standard dolly to a cart with the stair walking capability. It’s easy to navigate up and down stairs, steps and curbs. It reduces body fatigue, body injuries, while maximizing efficiency, and safety.