YYGIFT One Pair of 1'' Diameter Barbell Clamps ABS Locking Collars Clamp for 1 Inch Barbells
Description:
Designed to be used with standard 1 inch bars.Fits all standard 1 inch/25mm dumbbell barbells.
These collars are a favorite for crossfit and many other commercial gyms.
It's very easy to use,you can use it at home, toss it in your bag to take to the gym or even to a friends house.