The weightlifting clamp ring is equipped with a quick release and locking function, which can be easily opened and closed with just one finger. It is easy to install, does not slip during use and reduces the damage causedwith multiple panels. Designed for use with all barbells with an inner diameter of 5 cm. Clamp closure, simply slide onto clamp to engage. Quick removal of the bracket with good attachment ability. With rubber inserts to prevent the collar from slipping when attached to the pole. It is suitable for sports, high altitude press, weightlifting and other sports. It is widely used in outdoor activities such as home and gym. It has strong adhesion and can be released easily and quicklyChange weight. Type: Barbell Clamp Material: ABS+Nylon Applications: Barbell Bar, Lever Bar, Bell Piece Attachment Features: Barbell Clamp, Fitness Spin Lock, Quick Release, Cross Training, Gym Equipment Accessories Dimension: approx. 5 cm / 1.96 inch Color: Gray Package includes: 2 pieces x clamp neck dumbbells Note:1. Please allow 0-1cm error due to manual measurement. Please make sure you don't mind before you bid.2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!