This IPF spec, ZEUS Power Bar, Approved Power lifting Bar is proudly made and assembled in the USA using only the best quality steel, bushings and coatings. Lifters will enjoy its aggressive deep diamond knurling as well as the center knurl that firmly grips the neck and shoulders when squatting. The 28.5mm shaft comes fortified with 200,000 PSI high tensile strength steel that delivers stiff performance with a slight amount of elasticity on heavy lifts. Sleeves rotate on oil impregnated bronze bushings for the perfect amount of rotation and a light machine grooved surface keeps collars and weight plates locked on tight. The shaft is black oxide with the sleeves being silver zinc.