Description: Quality material: This dumbbell bar nut is made from quality cast iron and steel, offering durability, resistance to wear and tear, and long lasting use without deformationDumbbell fixing nut: Designed specifically for securing dumbbells, this dumbbell screw clamp is easy to install and provides stability for your strength trainingSuitable size: With an inner diameter of 2.6 cm, this weight bar screw clamp is compact, portable, and fits barbells or dumbbell bar with a diameter of 2.5 cmWide application: This barbell spinlock collar is ideal for strength training; weight lifting; adjustable dumbbell handle; straight barbell uses among othersPractical accessory: This strength training equipment makes a practical gift for family members or friends who enjoy weightlifting, fitness training or home workouts Specification: Material:Cast Iron and Steel Size Chart: Hole Diameter 2.6cm/1.02inch Package Includes: 1Dumbbell Bar Nut Note: Please allow slightly errors 1-2cm differences due to manual measurement.