Strong and durable material: The 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 Grip: Spring collars clip provides superior grip to securely hold the plates in place, sturdy enough to support heavy weights for a more efficient and safer workout routine. Easy to use: Only gently press down on the rubber grips, you can easily slide in and out of the barbell ring. It can be easily operated with one hand, open and close with one push, help you put on and take off easily to change weight. Safe for exercising:This spring-loaded clip clamps the plates tightly to the bar, prevents the plate weights from slipping off the bar. Make sure you stay safe when performing snatches, squats and various presses. Number of shipments: 4 pieces