The Diamond bar is manufactured in Decatur, Al. This bar is 100% made in the USA. This barbell is solid to the core. Snap ring construction and high quality 1 1/4'' bronze self-lubricating oil-lite bushings give this item a smooth, even spin and great durability.
There is no center knurl. And rings are spaced to IWF and IPF specifications. The 15kg bar has a 25mm shaft rated at 150,000 psi. The end caps are color coded and easy to read to differentiate between 20kg and 15kg.