My Pocket Gadget - Swiss Army Victorinox

I have this Swiss Army Victorinox knife code name: Tinker, i never failed to carry it in my pocket anywhere i go even to work lol. It's very handy multi-tool device that helps to do basic daily life job like cutting, screwing, or whatever it can do including as a self-defense weapon. So what's the Tinker has is basically as follow:

1. Philip screw driver
2. Reamer
3. Small blade
4. Big Blade
5. Saw blade
6. Can opener + Flat screw driver
7. Bottle cap opener + Flat screw driver
8. Tweezers
9. Tooth Pick

Recently i just got another one, free gifts from Standard Chartered bank credit card Swiss Army Victorinox code name: Huntsman. The tool available almost similar to the Tinker except that it has the Scissors but without the Philips head screw-driver. The blade and scissors are razor sharp ;).

Huntsman Tool:

1. Cork-screw
2. Hook
3. Reamer
4. Small blade
5. Big Blade
6. Saw Blade
7. Scissors
8. Can opener + Flat screw driver
9. Bottle cap opener + Flat screw driver
10. Tweezers
11. Tooth pick

My only concern now is the old Tinker big blade getting blunt, so i am looking for a sharpener tool that can revive its sharpness without damaging too much of the blade smooth steel surface.

Tips from Victorinox: Blades that do not move easily: open and close  a few times in warm water, then dry and oil.

Message from Victorinox: Victorinox GUARANTEES all tools to be of first class stainless steel and also guarantees a life time against any defects in material and workmanship. Damages caused by misused or abuse are not covered by this guarantee. This does not affect your statutory rights.