The XMark Two Chrome Olympic Spring Collars with Plastic Grips XM-3605 ensures plate weights are held firmly in place during lifts. This will allow you to maximize your workout potential by preventing weights from sliding or falling off the bar. Chrome finish on the spring collars provides a clean appearance and plastic grips enable their easy addition to and removal from the bar. The XMark Two Chrome Olympic Spring Collars with Plastic Grips XM-3605 gets the job done, keeping plates attached to your bar.