KYLIN SPORT Pair of 2" inch ABS Locking Collars Clamp Hook Grip w/ Quick Release Secure Snap Latch For Standard Olympic Barbells This barbell clamp fits for 2 inches Olympic standard size Quick snap collars are a innovative design, superior durability and exceptional performance is perfect choice for any Olympic style bar. A pair of buckles about 350g Material:ABS. The most durable collar that will stand up the toughest home, gym, or group-exercise environment.