1. The line protection tube head is severely worn and the frame has been touched. The line protection tube of this part of the racket needs to be replaced immediately, otherwise the carbon body of the worn racket will not only seriously affect the life of the racket, but also damage the quality and balance of the racket;
2. The thread hole inside the wire protection tube is broken, which may be caused by threading and normal use. In this situation, it is recommended to replace the wire protection tube, because the internal thread is easy to cut the racket body when threading and after use;
3. If you have a favorite racket, in order to make the racket beautiful, you also need to replace the wire protection tube.
Applicable shot type: PRO STAFF 90