Dreampark Barbell Clamp, 1" Diameter ABS Barbells Locking Collars Clamps with Quick Release.(1 Pair) Material:ABS, Diameter: 1 inch / 25mm Perfect for crossfit workouts, overhead press, deadlifts, bench press, or any other workout using 1 inch barbell. This barbell clamp fits for 1 inch fitness equipment weightlifting dumbbell barbells size. Fast locking and release, not easy to slide. Note: not fit threaded bar and 2 inch olympic bar. Package Include: One pair of barbell clamp