If you're looking for an way to upgrade your home gym equipment, these nuts are a great choice. They are an to improve the safety and security of your workout routine. Self-locking nut, more safe and reliable to use. Fine processing, easy installation. Features -Color:Multi -Material:Cast iron -Size:5.00X3.50X3.00cm/1.97X1.38X1.18in -The practical design of the universal barbell and dumbbell nut allows it to fit most barbells and dumbbell bars. -The self-locking mechanism of the self-locking nut adds an extra level of safety and stability. -The use of wear-resistant cast iron materials ensures the longevity of the nut. -The installation and removal of the nut is simple, making it convenient to use. -The universal practical nut is a cost-effective way to improve your home gym setup. Package list: 1 x pair of nuts