The Olympic Bar Weight Clips fit onto standard 2" diameter Olympic barbells to safely lift the bar without fear of the plates falling off. All you need to do is squeeze the handles together to pull off and remove or add weight plates and then replace. The heavy-duty construction and high-tension ensure our high-quality weight plates stay where they are. When you are not using them, you can store them on the Portable Plate and Barbell Storage Tree or any Titan Series Power Racks to keep your other plates in place.