4x 25mm Barbell Clamp Collar Clip Olympic Weightlifting Lift Spring Dumbell LockFeatures: This barbell clamp fits for 1 inch Olympic standard size. Perfect for crossfit workouts,Olympic lifts,overhead press,deadlifts,bench press,or any other workout using 1 inch Olympic Barbell. Material: reinforced plastic ,ABS,Package Include: 4 * Barbell Clamp Satisfaction Guaranteed: If you're unsatisfied with our 1 inch olympic barbell clamp, simply return them via Amazon's no hassle returns Easy to use, one hand install ~ Spring powered