1Prevents plate weights from sliding off the bar 2They will fit all standard 1inch Hole (2.5cm) weightlifting barbells or dumbbell bars 3Made from firm steel and rubber support grip. 4Rubber Grip Handles allows comfortable and easy to method to remove. 5Perfect for everyone and every gym or home equipment. Features: Prevents plate weights from sliding off the bar They will fit all standard 1inch Hole (2.5cm) weightlifting barbells or dumbbell bars Made from Solid steel and rubber support grip. Rubber Grip Handles allows comfortable and easy to method to remove Specifications: Overall Size(LxWxH): Approx. 7.7x7x2cm/ 3.03x2.76x0.79" Package Included: 1 Pair 25mm Barbell Spring Collar Clips Note:This product cannot be used for threaded rods, onlyslickrods.