If you are in the market for a car dolly or a set of tire skate, stop looking! These commercial quality skates feature top grade steel, the most robust 3" castors available, and quick and easy assembly. Our skates have ball bearings on the swivel (which all casters have) and on the axle shaft. It rolls with less than 1/2 the force of a standard caster. I have seen young women and children push 2 ton vehicles. Today's technology housed in a robust design will provide you with years of service. Bid with confidence as we have 100% positive feedback and stand behind every product we sell. Features: Includes four (4) 12" tire skates, One person can easily handle and move a 3 ton vehicle, 12" x 16" Solid Steel Plate--X Large--not the 8" you see elsewhere, Powder Coated--not painted, Won't chip/scratch, 3" Premium Ball Bearing Castors, Rated at 6000lbs., Integrated hole in the top of the skate for easy storage--mounts onto a hook in your garage, Professional/Mechanic Quality - not like the competition, Minor assembly is required--installation of the 3" ball bearing wheels.