Build quality seems excellent and very friendly for the bar and bumper plates. They're extremely easy to clip and unclip on the bar. They open wide to slide on/off. They don't stay locked into their exact place with overhead drops with bumper plates. I'm not sure if any collar that doesn't truly bite down into your bar can ever actually hold Olympic plates in their same location from overhead drops. But I really have no complaints about this product as it does more than it needs to for what I ask from it. Fits exactly the same on my power bar and my Olympic bar. I have no worry about plates falling off.