●Quick release barbell collar for quick release ●Easy one-handed installation and removal, greatly improves the hassle of removing and removing the weight ●For Olympic bars (shafts) with a diameter of 50mm (Does not work with regular bars (shafts) with a diameter of 1.1 inches (28 mm). ) ●This is a set of 2 collars (fasteners). Weights (plates) and bars (shafts) are not included ●Weight: Approx. 8.8 oz (250 g) (weight of 2 pieces)