ITEM NAME:2Pcs Barbell Collar 1'' Standard Spin Lock Screw Description: Made of qualified cast iron with chrome plating- Anti-rust, high strength and anti-corrosion Designed for secures the position of dumbbell on the bar Easy and convenient installing/ removing To provide balance and stability safely and securely Fits almost all 2.5cm/0.98 inch diameter bars Specification: Application: for 25mm/1'' Weight Bars Inner Diameter: 23-26mm/ 0.9-1.02 inch Package Includes: 2 Pieces Dumbbell Collar SKU: FUZ0016824319510184.Designed for secures the position of dumbbell on the bar. 2 Pieces Dumbbell Collar. Application: for 25mm/1" Weight Bars. SKU: FUZ0016824319510184. To provide balance and stability safely and securely.