Made from reinforced plastic and industrial grade rubbernQuick release and slide resistantnGreat for workouts, Olympic lifts, overhead press, deadlifts, bench press and morenOne of the favorite and useful clamp collar for coaches and commercial gymsnFits for 2u0026#34; Olympic standard sizenSportsun Barbell Clamp Collars are made from reinforced plastic and industrial-grade rubber with injection molded pressure pads. They are very durable and lightweight. You can use it at home, or toss it in your bag to take to the gym. The collars are perfect for crossfit training, strong lifts, powerlifting, weight lifting, or any other Olympic bar workout. A perfect gift for someone who does sports or yourself if you want to be sure you have the most quality locking barbells. Specifications Material: plastic and rubber Size: 6.69" x 3.94" x1.97" Package contains One Pair of Locking Barbell Clamp Collars