Glamchics Olympic Weight Bar Clips2 Inch Barbell Collarsquick Release Olympic Durable Barbell Clamp For Weightlifting Powerliftingolympic Lifts And Strength Training(Black)Locking 2 Inch Diameter Bar. Easy to use, design to keep you safe.These collars are a favorite for crossfit and many other commercial gyms. Material:reinforced plastic ,ABS,The B..