Feature: 1. 7*7 strands nylon coated steel wire core,soft and flexible,high strength,wear-resistance 2. 360° Rotation bearing swivel,strong tension,high speed rotation for anti- entanglement of fishing line 3. Stainless steel oval shape split ring clip for quick change 4. Inside aluminum crimps,outside heat shrink tube,more firmly joints 5. Great for saltwater fishing sharp-toothed predators 6.Can be attached to the hook to prevent the fishing line from being bitten by the fish