Ultra Smooth Swivel: The swivels fishing tackle has built-in stainless steel balls, which can rotate at high speed by themselves.That will reduce your fishing line risk of twisting even breaking.   Strong Stainless Steel: The two welded rings are solid and strong giving you the confidence to be around big fish. If you’re fishing for large saltwater fish, a ball bearing swivel is the best option.   Make sure the rings are closed with a welded joint to avoid any risk of them opening out.   Essential Fishing Tackle: The ball bearing swivels not only suitable for freshwater and saltwater, but also for sea fishing,   offshore fishing, topwater fishing and fly fishing etc. The swivels can also be used with rigger rigging.