Do you have a heavy load to move in the shop? According to General International, its model 50-035 heavy-duty mobile base is up to the job. With its sturdy, all-steel construction, the 50-035 is designed to hold machinery and other square or rectangular objects that weigh up to 1,000 pounds. This base is equipped with four heavy-duty, three-inch wheels, two of which are fixed and two are on swivel casters. This configuration allows for the moving of machinery into tight locations within a shop.