I like to carry a small knife because you never know when you're going to need to shank a mother...ooooh, okay. Not really. I just think it's a useful thing to have on hand sometimes. Spend most of my time in an office environment / business casual dress. No real need for a heavy duty knife. Found this super thin blade from Boker. It's definitely not heavy duty but will perform most light pocket knife functions. It is small enough to clip inside the wallet.
