Just acceptable quality: steel bracket is thin a little low load capacity. The caster is not too durable as it has only one ball bearing raceway in swivel head so if overload or by foreign force the bearing ball may fall out.
Superior than most of small China caster, nearly archive the same level with Japan ones. Sturdy rubber that is hard to break, hard to wear out by daily use. This is one of the most success product line of Phong Thanh.