Set of 4 Heavy-Duty Auto Dollies designed to assist in moving automobiles, trucks, boats, trailers, tractors, jet skis, motorcycles, airplanes, and most heavy vehicles with ease, The Auto Dolly is placed under each tire of the vehicle, making the vehicle a rolling cart that will now roll in any direction with ease. The large 2-1/2" diameter by 1-5/8" wide composite roller bearing swivel casters prevent damage to painted floors. Each Auto Dolly is rated at 2,500lbs. Measures 16" wide x 16" long. Made of 1/4" plate steel. Made in USA.