This unique dolly comes standard with two 8″ pneumatic wheels in the center and four 8″ pneumatic wheels on both ends that allow the dolly to swivel 360º and act as shock absorbers over bumps and thresholds. There are three cross members, which come standard with no-stick rubber belting able to hold any large moveable object across virtually any terrain. Whether that is an appliance, a piano, a hot tub, a large potted plant, or just something BIG, this dolly can handle the weight AND the terrain!