Product Description Size: 2.5cm, 3cm Color: blue, red, black Material: plastic Package content: 2*barbell bar buckle 1. Robust materials: Designed for a hole diameter of 25 mm / 30 mm, made of high-strength ABS plastic to withstand heavy weights and intensive training sessions. 2. Advanced design: Spring-powered snap-latch mechanism ensures secure fastening, providing quick and reliable locking compared to traditional spring clips for improved safety during workouts. 3. Durable construction: Features rubber lining on the interior to firmly hold weight plates in place, preventing loosening or slipping during use. 4. Easy to use: Simple open and close function for quick installation and secure fit. 5. Compatibility: Suitable for barbells used in weightlifting, powerlifting, gym, fitness, crossfit, weight training, strength training, and related exercises.