HANGER BOX RAIL W/4-1/2IN BOLT

National Hardware Rail Hanger, 300 lb Weight, Bearing Type: Roller, Roller Width: 1.61 in, Roller Diameter: 2.14 in, Shaft Diameter: 0.42 in, Steel, Zinc, Dimensions: 5.38 in L x 4.51 in W x 1.61 in H, Suitable for: #59, #5100, #5103, #5104, #5105, #5110, #5114 or #5116 Box Rails