Park's FR-5G Cassette Lockring Tool fits most cassette lockrings from Shimano, SRAM, SunTour and SunRace. Made from heat-treated tool steel, the FR-5G features an extra-long splined body to prevent slippage and a guide pin to ensure the tool is in straight, preventing stripped lockrings. And, it can also be used to remove and install Shimano disc brake rotors. The FR-5G requires the use a chainwhip tool to prevent the cassette from turning during lockring removal.
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you cannot beat this cassette tool with a rubber hose. Mine has lasted so long I cant wait to break it. Just kidding. Park makes quality tools fools.