Evan Hydewrote a review of Park Tool Cassette/Rotor Lockring Removal Tool - FR-5/FR-5G on June 27, 2011
Many years ago my local mechanic got sick of me coming in to get cassettes changed. So he sold me one of these. It has saved me so many trips to the bike shop that's for sure! Changing a cassette is something every cyclist should be able to do, and this tool is the best!