The Park Tools SR-11 Sprocket Remover/Chain Whip Tool combination chain whip and freewheel / lock ring remover wrench is heat treated to prevent bending and flexing, with a molded handle for comfort.
Hardened pins to keep the chain in place
Works on 5- to 11-speed cassettes and freewheels 1" (25.4mm) box-end wrench fits Park Tool Freewheel/Cassette Lockring Tools
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