Genuine Binzel replacement spring is vital to your MB15 MIG torch as it is this spring that is responsible for retaining the shroud in place on your MIG torch whilst you are welding.
It is important to make sure you do not twist the shroud in the wrong direction when removing or replacing the shroud as this action could distort the spring rendering it useless. Turning the shroud in the wrong direction may cause the shroud to lock in place and not be possible to be removed requiring all three parts to be replaced, shroud, tip adaptor and spring.