Magnums Transformer Drywall Cart feature four 8 in. hard polyurethane Max-Performance casters which are designed to hold up 3,200 lbs and offer a premium ride and excellent maneuverability. Connecting two units together to form a 10 ft. train, or connecting them side by side to create a 5 ft. x 4 ft. platform enables you to handle a 5,400 lbs. load capacity when the weight is distributed equally.