Park tool sprocket remover chain whip sr18this combination chain whip and freewheel lockring remover wrench is heat treated to prevent bending and flexing the long handle provides excellent leverage and it is moulded for comfort the 1 box end wrench fits freewheelcassette lockring tools and the chain whip can secure the cassette for lockring removal features works on 18 fixed gear sprockets 1 25 4mm box end wrench fits park tool freewheelcassette lockring tools features hardened p