American Barbell Performance Bearing BarAmerican Barbell's Performance Bearing Bar incorporates a host of proprietary features unlike any other on the market. It's with this technology our bars spin smoother as the weight gets heavier on the bar. The bar shaft is made from precision ground alloy steel with a hard chrome coating. The strength of the shaft is tested with every shipment of raw material to ensure we have a consistent 190,000 PSI tensile strength. This attention to detail also