【Heavy Duty】The dumbbell spring collars are made of stainless steel, providing greater functionality and durability compared to plastic clamps. Delivering a secure force to hold the weight bars. 【Secure & Sturdy】Our locking collar clips are designed to firmly clamp the barbell plates, preventing slippage off the barbell bar, giving the reliable protection for weightlifting fitness. As well as maintain a stable center of gravity, keeping the weight on the bar. 【Perfect Size】3 circle design of the spring clip collars, the diameter of the hole is 50 mm / 2 inches. So please measure the diameter of your barbell before purchase to ensure better fit. 【Range of Use】The dumbbell spring collars are suitable for home, gym and outdoor activities, can be applied for workouts, overhead press, weightlifting, powerlifting, strength training. 【Easy to Install】Just simply squeeze the handles inward to widen the weight clips for bars and slip them onto the barbell. Then hold them in place to secure the weight plates., Weight: 0.93035074564 pounds, Manufacturer: AccEncyc