Easily replace the protective pipe inside the head that has worn due to leader friction, etc.

Replacement Method:

1. Cut and remove the worn-out pipe at the end with a utility knife or scissors.
2. Insert the replacement protective pipe and cut it slightly longer than the main body by 1mm to 2mm. (To match the shape of the head, cut the pipe slightly diagonally.)
3. Lightly burn one side with a lighter and melt it.
4. Similarly, burn the other side and fix it.