Very practical pliers, the installation and removal of the spring must be practical, suitable for all woodwind instruments, and can easily enter small spaces. One end is flat, the other has a notch, and a spring handle.
Remove the spring: cut off the spring, leave about 5 mm at the bottom, align the flat head with the spring head, and align the gap head with the other end, pay attention to leaving the space for the spring to be ejected.
Install the spring: put the gap into the spring head, and align the flat opening with the spring tail.

Length: 125mm
Head width: 6mm