NIUNIU Dumbbell Hex Nut Spinlock Collar Spin Lock Screw Nuts Dumbbell Barbell Bar Clips for Weight Lifting Standard dumbbell bar self-locking collars, which are enough to meet your daily use and replacement needs, effectively fix your weight, and let you enjoy sports with full confidence. Materialstrong and durable, can be used for a long time. Easy to useThe dumbbell screw clamp with rubber-edged anti-slip tightening collar ensures that it is securely and safely attached to the dumbbell or barbell bar; Smoothly contoured fingertip handles ensure quick and easy installing and removing from dumbbells or barbells. Wide range of uses: Our rotating lock ring clamps are suitable for barbells, dumbbells, weightlifting, etc. They are easy to carry and suitable for taking to the gym or exercising at home. Colour: Black size:Barbell anti-slip collar is suitable for 25mm standard weight lifting barbell or dumbbell bar, Quantity delivered: 4 pieces Warm prompt: 1.As different measuring methods,it will occur 1-3 cm deviation about the items,please ensure that it is okay for you before ordering. 2. Because of different monitors and lamplight, the picture may not reflect the actual color of the item, really thank you for your kind understanding 3. Only the above package contents, excluding other products.