Almost all of the small 65mm keychain-sized Swiss Army knives from Wenger include a small pen blade. It is sharp, and extremely handy for its size!
WARNING:The small blade on all types of Wenger Swiss Army knives is a non-locking blade-- if you push in the wrong direction, the blade will close into the body (possibly endangering fingers).
Uses: The small pen blade on the smaller Wenger Swiss Army knives is 45mm long (1 3/4").