With the CAP barbell 2 weight plates stay in place while you exercise. At the standard Olympic size diameter the tool fits all this 1 piece weight collar bar comes with a chrome finish that protects the tool from rust for years to come. Using a plastic cover for the handle the device provides a secure grip making it easy when placing the collars on or taking them off the bar. By keeping the weights secure with this you ll also gain the maximum benefit from every workout because secured weight exerts the proper amount and type of stress on the body. The device can also be used for exercise by itself. Many people squeeze the weight collar handles in order to work out the forearm muscles and improve their grip.