This Victorinox scissors spring, large A.3757 is a replacement spring for the scissors of your Victorinox pocket knife. Sometimes the springs break, or you lose them. That is when a replacement can definitely come in handy. This spring is perfect for Victorinox models of 91 mm and 111 mm long. Think of the Victorinox Huntsman, Outrider, Climber, Ranger and many more models.
Replacing the spring is a little tricky. With a solid pin you can push the old spring out. It is important to push the eye. A solid skewer will do the trick. With it you can push the spring out. Afterwards you place the spring on a block of wood, after which you push the scissors over the spring. As such you will have most control as you push the spring in the scissors.