This fishing snap swivels made by copper and stainless steel,it makes the fishing swivel high strength,nickel coating provides excellent corrosion resistance and abrasion resistance for the intense battles against your prey.Ball bearing in body allows you to change leaders or lures in seconds. polished smooth,does not hurt the line. They Works for all kinds of fishing situation from freshwater bass fishing to saltwater trolling, jigging.Six stainless steel bearings loaded in the fishing snap swivels Will not get rust even in saltwater. Free rotation will make your fishing lures more attractive. Fast jump into and out off water.The easy open fishing swivel snap will help you change the lures and fishing line fast.