Standard weight collars prevent the weight plates from moving around on the bar when an exercise is being performed. Helps to minimize the risk of injury due to weights falling off or shifting during the movement. Particularly useful for any exercises when the bar is being held overhead.
Look for the Impex Marcy Olympic Bar Spring Clip Collar standard coil collars to help keep your weights in place. These collars are tension loaded and made from durable materials to allow you to focus on maximizing load while avoiding injury for you and your clients.