Ideal for most medium industrial and warehouse jobs, this double ball swivel caster has the capacity to transport loads at 500 pounds. This caster has a wheel four inches in diameter with a steel core and a two-inch cast iron tread supported by a zinc-plated steel frame with a brake system. The mounting plate is measured at 4 1/8 inches long and 3 3/8 inches wide with a 5/16-inch bolt diameter.