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.
The 2-stage ball bearing is made of heat-treated steel to increase friction and wear resistance. The heat treated swivel neck ensures a secure hold of the bearing balls in harsh situations. Has Z shape dual brake pedal - very light and easy to use.