Safely transport loads up to 375 pounds with this swivel caster. This light to medium-duty caster has a brake mechanism and a 1 1/2-inch wide and a four-inch diameter polyolefin wheel. The mounting plate measures four inches long and 4 1/2 inches wide with a mounting bolt diameter of 3/8 inches. The bolt holes are 2 5/8 inches long and 3 5/8 inches wide.