Strong and durable materialThe dumbbell clip is made of high quality materials, ABS plastic and steel. Sturdy construction won't break and deform easily, can firmly support your bar. Safe and Secure GripSpring collars clip provides superior grip to securely hold the plates in place , strong enough to support heavier weights for a more efficient and safer workout routine. Easy to UseOnly press the rubber grips gently, you can easily slide in and out. out of the barbell ring. It can be easily used with one hand, open and close with one push, help you put on and take off easily to change weight. Safe to do exerciseThis spring clip clamps the plates tightly on the bar, prevents the plate weights from sliding off the bar. Make sure you stay safe while performing snatches, squats and various presses. Number of sends: 4 pieces