AMYSPORTS Ball Bearing Swivels are made for high performance in fishing activities. Features of these fishing swivels such as corrosion resistance, abrasion resistance, shock resistance and tension,make it become popular with fishermen. There are ball bearings inside it to make sure more smoother and high speed rotation. Free rotation will make your fishing lures more attractive. The stainless steel and black nickel polished could prevent these from rusting in saltwater. You can freely use it in both saltwater or freshwater. The material keep it from rusting and breaking.You will never lose your connectors on it.