For the installation and removal of the lockring on both Shimano HG and SRAM cassettes, when used together with a 24mm spanner or socket and a cassette holding tool or chain whip. It can also be used on Centerlock brake discs that use a 12-spline (Ø23.4mm) lockring. Removal tool to fit 7 to 12 speed Shimano HG & SRAM cassette lockrings. Also suitable for use on Shimano centre lock brake rotor lockrings. For use with a 24mm Spanner. For use with a Cassette Holding Tool. Manufactured from chrome molybdenum with a black finish.