Feature:1. Premium Spring Steel and ABS: These collars with spring clips are made of premium spring steel and ABS plastic for good durability.2. Elastic Structure: The barbell spring collars fixes its weight bar in a firm and durable way, and its elastic structure ensures excellent functions and higher durability, making the equipment durable.3. Secure: The spring pressure lock provides superior grip, which can safely fix the steel plate in place for safer training. Add clips to free bars or dumbbells and safely perform snatches, squats, deadweights, and various presses.4. Practical: These dumbbell locking clips will not slide during training and are more durable than many other necklaces on the market. Improve your balance, coordination, flexibility and endurance.5. Wide Application: This barbell clamp clip allows rapid weight change of plates and can be used for different plates, including steel plate, polyurethane or rubber coated plates.Specification:Item Type: Barbell CollarsMaterial: Premium spring steel and ABSGross Weight: 110g/3.9ozDiameter: 25mm/0.98in, wire diameter: 3.2mm/0.13in, 2 turns.Package List:4 xBarbell Spring Collars