Park tool sprocket removerchain whip sr 11this combination chain whip and freewheel lockring remover wrench is heat treated to prevent bending and flexing with a moulded handle for comfort features a handy combination of chain whip and sprocket remover heat treated body to minimise bending and flexing the hex opening fits all park tool freewheel removers and provides a good long lever to work with hardened chain pins provide strength for the toughest of jobs nylon coated handle for comfort