The FR-5.2 is designed to fit the most common tool fitting found on 7-to-12 speed cassette lockrings, including models made by ShimanoA(R), SRAMA(R), and others. Also fits disc brake lockrings and lockring adapters with 12 internal splines, and top caps of some Rock ShoxA(R) suspension fork models. Thin wall construction allows use without removal of cones and locknuts. The 1" hexagonal base can be used in conjunction with a socket, wrench, or bench vise. Heat-treated alloy tool steel construction for a lifetime of use. FR-5.2 FEATURES a Fits 12-spline tool fittings with an approximate outer diameter of 23.4 mm including: a Cassette lockrings from ShimanoA(R), SRAMA(R) (including 1x), SunRaceA(R), SunTourA(R), Chris KingA(R) and others a Disc brake lockrings and lockring adapters with 12 internal splines from ShimanoA(R) and other brands a Top cap of some Rock ShoxA(R) suspension fork models including PikeA(R), Lyrik(TM), SIDA(R), Revelation(TM), RebaA(R), and Paragon(TM) a Center bore for axle clearance is 12 mm