Ribble Shimano Cassette Remover Tool Cassette lockring tool for the removal of Shimano HG cassettes & with a tough hardened steel finish. This is a home toolkit essential & makes the changing of cassettes simple & straightforward. Changing cassettes is one of those easy jobs that every cyclist should learn for when the cassette needs replacing or you want a different gear range. Use in addition with the Ribble R-CW Chain Whip for best results. Can be used with 20mm spanner or socket driver Hardened finish About Ribble Cycles Founded in 1887, Ribble Cycles continues to be at the very heart of British cycling. From award-winning bikes to innovative clothing & accessories, our long cycling heritage means that we truly understand your needs. Created by cyclists for cyclists.