Introducing the fwe transformer series 5 10 speed chain whip wrench this is designed to hold the cassette and freewheel when you remove them the fwe transformer series is has a changeable function to it with 1 handle you can have up too 6 different tools just by changing the head making this system light on space and lighter on the pocket the handle is made from anodized aluminium with a comfortable tpr handle the tool hard is made from steel this made the whole tool strong and light