Usage Tips:Size: 2.5cm, 3cm Color: blue, red, black material: plastic Package content: 2*barbell bar buckle 1. Robust materials: on a hole diameter of 25 mm / 30 mm, made of the hardest ABS plastic and can withstand even the heaviest weights and intensive training sessions. 2. Advanced Design: Spring Powered Snap-Latch-Design to keep you safe, Faster than with classic spring locks, more safety during training because the weight plates are firmly and securely fixed. 3. Durability: Thanks to the rubber strips on the inside, the locks are absolutely secure and prevent the panes from loosening or slipping. 4. Easy to close: easy to open and close Just close it and it's tight. 5.Fits: barbell clamps for weightlifting, powerlifting, gym, fitness, crossfit, weight training, strength training, triceps trainer, etc.