Patented product: U.S. Patent Number D905805. Quickly change weights: The quick release lever makes it quick and easy to swap out weights.
2-Pk 2 inch Barbell Collar Olympic Barbell Clamps Quick Release Black
Olympic Barbell Clamps Quick Release Pair Weight Clips for 2Inch Barbell
Genesis Systems - 2" Olympic Barbell Clamps - Quick Release - Red
2" Inch Olympic Barbell Clamps Quick Release Locking Collar Clips Weightlifting
2" Inch Olympic Barbell Clamps Quick Release For Weightlifting Rose