The Victorinox Excelsior Swiss Army knife is a very light and simple knife that contains two sharp blades, and no other tools. It has a very narrow, pocket-friendly profile, so you'll hardly even notice you are carrying it!

This model of Swiss Army knife is no longer produced by Victorinox, but it is frequently still available in used condition. It is becoming a collector's item and sells at a premium price, so if you just want an inexpensive small pocket knife, get a Pocket Pal instead (the only difference is that the Excelsior has a key ring, while the Pocket Pal does not).

Excelsior Alox-- same features in a light aluminum body (retired model)
Pocket Pal-- no key ring
Secretary-- no key ring, light aluminum body