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The essential tool for removing and installing thru-axle cassettes, the Park Tool FR-5GT Cassette Lockring Tool with 12mm Guide Pin's small size and easy of use even works with certain disc brake rotors, too.
Utilizes a 12mm Guide Pin to Stabilize the Tool in Use
Fits 12-Spline Cassette Lockrings from Shimano®, SRAM®, SunRace®, SunTour®, and Chris King®
Fits Some Shimano® and Similar Disc Brake Rotor Lockrings