Features:Prevents plate weights from sliding off the barThey will fit all standard 1" Hole (2.5cm) weightlifting barbells or dumbbell barsMade from Solid steel and rubber support grip. Rubber Grip Handles allows comfortable and easy to method to removeOverall Size(LxWxH): Approx. 7.7x7x2cm/ 3.03x2.76x0.79"Package Included:1 Pair 25mm Barbell Spring Collar Clips