Based on the scratches and wear we see on incoming knives, this seems to be the implement that is used most often, by most Swiss Army knife owners. It is a handy sharp edge that can easily cut vegetables, sandwiches, paper, wood, and even soft metals.
WARNING: The main blade on many Wenger Swiss Army knives is non-locking. If you push in the wrong direction, the blade will close into the body (possibly endangering fingers). Be careful when using it with a great deal of force! Wenger does have locking blade models that are safer to use.
Uses: The large blade on Wenger Swiss Army knives has the following lengths (depending on overall knive size: