1.6000LBS WEIGHT CAPACITY - The large 16-inch long x 12-inch wide plated ball bearings are designed to support the weight of your vehicle. And each car dolly supports up to 1100 lbs, totaling 4400 lbs. This set makes restoration projects of medium and heavy wheels easy and simple.2.SOLID CONSTRUCTION - The wheel dolly is made of thick diamond-plate steel that is durable and rust-resistant. It can support an impressive weight and will not bend out of shape while working, which ensures high work efficiency and safe operation.3.CONVENIENT OPERATION - The tool is easy to install. You only need to install the included 3-inch (7.6 cm) ball-bearing wheels on the base, and then you are ready to get moving. And each wheel dolly is equipped with a convenient handle that makes you easy to carry the tool to your desired location.4.UNIVERAL CASTERS - Four dual-bearing swivel casters allow mobility in all directions by providing 360rotation, making the dolly optimal for one-person work. Each dolly is equipped with locking mechanisms that keep them in place when you need them to stay still.5.VARIOUS FUNCTIONS - The wheel dolly is an ideal option for garage, auto sales showrooms, workshops, etc. It is also applicable to the restoration of cars, trucks, trailers, tractors, motorcycles, lawnmowers, furniture, and other equipment.********************************************************************************************************SpecificationsColor: SilverMaterial: Heavy Duty Powder Coated Steel ConstructionCaster Material: PlasticFinish: Powder CoatPlatform Size: 12"(W) x 16"(L) / 30 x 40 cmCapacity: 1100 lbs EachCastor Diameter: 3'' / 7.5 cm********************************************************************************************************Pakcage Content4 x 4 Wheels Vehicle Dollies