These 50mm smooth spring collars with black handles are sold in sets of two and are suitable for Olympic barbells. The comfortable, flat grip makes opening them effortless before or after a workout. These spring collars give a tight hold and are essential for keeping your plates in place during a set. Features Grip: Flat handles that stop your hands from sliding when you are opening them Durable: Made of steel with plastic handles, these spring collars are long lasting Size: 50mm in size, suitable for Olympic barbells