Description This durable and ergonomically designed home gym equipment accessory ensures a safe lifting experience while making it easy for you to secure barbell plates with an efficient threaded collar system. The Marcy Threaded Curl Bar accommodates all standard plates with 1″ diameter holes and is adjustable so as your strength increases you are able to add on heavier weights. With a strategically cambered design this weight lifting equipment accessory will allow you to train as hard as you need to without stressing about wrist or forearm pain. Chrome-plated solid steel construction Threaded posts Includes two (2) threaded chrome collars