Featuring a double-ball raceway swivel, this plate caster with brake is load-rated up to 500 pounds. The mounting plate is 4 x 4 1/2 inches, with an outside bolt hole spacing of 2 5/8 x 3 5/8 inches, and a 3/8-inch mounting bolt diameter. The polyolefin wheel is 2 inches wide, 6 inches in diameter, and the wheel replacement number is 4-6-819.