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The Park Tool FR-5.2H Cassette Lockring Tool makes the removal and installation of 12-spline Shimano®/SRAM® style cassette lockrings a breeze.
Center Bore for Axle or Q/R Nut Clearance is 20mm
Fits Shimano®, SRAM® (including 1x), SunRace®, SunTour®, Chris King® and Other Cassette Lockrings
Also Fits Some Shimano® Disc Brake Lockrings