Functionality: If a barbell is listed as an Olympic bar but doesn't have a quick spin rate tensile strength isn't very good and the whip isn't very good either. Well then, it just simply doesn't belong to that category.
Durability. The tensile strength, you know, the finish, whether it has one or not, and then the sleeve construction. So whether it's needle bearings, ball bearings, or bronze bushings, maybe even, you know, composite bushings. There it is, how we landed on the top barbells on the market.