Product_description: ['HAMILTON\'s Maxi-Duty Casters are designed and built for the toughest applications including shipbuilding, manufactured housing, automotive and aerospace. Long life and dependable service are assured now more than ever with Hamilton\'s new HPIa,, Swivel Technology. The new technology is a significant upgrade from conventional ball raceways or unit load bearings and provides an even stronger platform. 1-1/4" diameter kingpin is integrally forged with mounting plate guaranteed for life.', 'Hamilton Casters Hamilton Maxi-Duty Forged Rigid 6 x 3 Nylast Ball 5400 Lb. Caster'] (Page 1)