evo.com | Park Tool General Shop Tools > The Park Tool FR-5.2H Cassette Lockring Tool makes the removal and installation of 12-spline Shimano(R)/SRAM(R) style cassette lockrings a breeze. Center Bore for Axle or Q/R Nut Clearance is 20mm Also Fits Some Shimano(R) Disc Brake Lockrings Fits Shimano(R), SRAM(R) (including 1x), SunRace(R), SunTour(R), Chris King(R) and Other Cassette Lockrings | Park Tool FR-5.2H Cassette Lockring Tool 2025 - 12 Spline