The caster is designed based on America's style so at first glance it's not so bad. But if you look closer, the Zinc coating is just so so, bracket steel & PVC wheel is not good and sharp. However, price is great for a ball bearing caster.
Double ball bearings help the caster rolls very smoothly. Overall quality is much better than those cheap China casters. PU wheel can withstand oil, grease. The PU wheel is cushion so will make less noise on operation.