The Park Tool SR-12.2 Sprocket Remover/Chain Whip. This combination chain whip and freewheel and lockring remover wrench is heat treated to prevent bending, flexing, and wear. The SR-12.2 features a long, molded handle in addition to a built-in hex-shaped driver. Note: Images showing cassette lockring removal tools are for illustrative purposes only. Lockring removal tools are sold separately. Features: Works on 5-12 speed road and mountain bike cassettes and freewheels (including SRAM and Shimano) Also compatible with 3/32" single speed cassettes (for 1/8" single speed, see SR-18.2) 1" (25.4mm) box-end wrench fits Park Tool Freewheel/Cassette Lockring Tools Hardened pins keep the chain in place 35.5cm (14") tool length