Tire dolly is constructed from high impact, rugged injection molded polyethylene with ribbed reinforcement for strength and durability. Can handle up to five tires and wheel assemblies or up to 8 tires. Moves 360 degrees for maximum maneuverability. Two units can be connected together and work as a creeper or a dolly for moving other lightweight appliances, furniture, etc. Features four 3 inch non-marring swivel castors. Storage located in middle of dolly with locking cover perfect for your small tire accessory parts. Maximum load of 300 lbs. Overall dimensions: 25" diameter x 4-1/2" high.