The THOR FORCE,DR FISH,9KM,SAMOLA, Split Rings Sea Course Fly Carp Fishing Swivels are designed for saltwater course fishing, suitable for both freshwater and saltwater fish species. Components made of hardened steel have a hard exterior casing and a robust core, and include arbors, axles, link components, driving pinions, camshafts and cardan joints,Fishing{sea and course}.
eBay