The Hit Fitness Olympic Bar Spring Collars pack features 10 pairs of Hit Fitness Spring Collars. These are 2" stainless steel spring collars are an essential accompaniment to our bumper plates and barbells for any Olympic lifting or strength and conditioning program. They slide onto barbells easily allowing for fast transition between plate changes. They are secure and will keep plates firmly in place during lifts. Features Pack of 10 Olympic Bar Spring Collars Pair 50mm High quality spring steel 2" Olympic Collars For use with Olympic barbells Durable and long lasting.