Steel pallet & machine dollies no need to wait for a forklift or pallet truck all welded steel dollies have six high-capacity, abrasion-resistant wheels on fixed axles to move heavy pallets, machinery, containers, and other equipment. center wheels project lower than the end wheels to allow easy turning. cast iron wheels have roller bearings for long life. durable powder coat finish. center opening = 33-3/16"l x 12-1/2"w.