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Converts finless Beater into twin fin. Can be used with two (2) Beater Finless Conversion Kits to revert back to finless. Safe and durable vs. traditional fins. Installs in minutes and easily removable. Fins made of engineered thermo-plastic for improved performance. Super-strong plastic screws for durability. Designed in California, U.S.A. by Catch Surf.