The Quick Release Collars fit onto standard 2-in. diameter Olympic barbells or loadable dumbbells to safely lift the bar without fear of 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. Built for Olympic sized weightlifting equipment, these collars will fit 50mm diameter sleeves once clamped. The aluminum construction of these clamps will speak for themselves; their durable build will last for years with proper care. The TITAN sticker logo is affixed to each collar, atop the sleek fire red paint job.NOTE: These are not designed to be thrown or dropped while on a barbell.