Bicycle Sprocket Chain Bike Steel Chain Whip Freewheel Sprocket Cassette Tool This combination chain whip and freewheel/lockring remover wrench is in high quality. Designed to be used in conjunction with a cassette lock ring tool to remove cassettes from hubs. It can also be used to tighten on screw-on freewheels. Caters for 8, 9 and 10speed cassettes. When remove flywheel, fixed wheel to prevent from damage