This kit replaces the front return spring and pin on your Model F machine.
The kit contains one precision return spring and one return pin.
Replacement is a snap, simply loosen the rear drive spring screw and remove them allowing your armature to open up giving access to the existing spring and pin. Discard the old worn parts, install the new ones and reinstall your drive springs. Be sure the drive springs are relocated in the original position under the keeper and screw, not directly under the screw itself.
If you do require assistance, please contact me.