The name is kind of a misnomer. It’s not a knife — although I’m sure you can kill someone with it. It’s not a butterfly pen — no cute insects on this bad boy. Made by Spyderco, a well-known knife manufacturer, these pens are designed with the pen twiddler in mind. It’s the ultimate in hand dexterity distraction for boring classes and meetings. Comes in 7 colors. The picture doesn’t do this pen justice, hit the jump to see it in action.