4pcs quality spring collars for barbells will be sold together, fit with your standard 28mm dummbell bars, suitable for home, gym and outdoor activities, can be applied for workouts, overhead press, weightlifting and more, easy for you to use, lock and unlock quickly. Features - Brand: WAKAUTO. - ColorSilver - Material: Steel and ABS. - Size: 8.00X9.00X3.50cm/3.14X3.54X1.38in. - Made of strong steel and durable ABS material for use, the perfect combination of toughness and lightness. - These spring collars for barbell and dumbbell are easy to use, help to lock weight plates in place and don't slip, assemble and disassemble quickly. - Works fantastic, these spring collars are easy on and , keeping your plates in place while exercising. - Useful accessories for workouts, standard weight lifting, overhead press, deadlifts, bench press, or any other fitness exercises. - Please measure the outer diameter of your barbell , only suitable for 28mm bars. Package list: 4 x WAKAUTO Spring Collar