With the Spyderco BaliYo you will own a pen that can also function as a butterfly knife! Even though a butterfly knife is illegal, this pen will still enable you to do cool tricks. As such this unique pen is not only functional, but also great fun. The BaliYo Wing is, with its 26 grams, a part of the BaliYo lightweight collection. And to make sure you quickly get the hang of the base it comes with a small manual. Incredibly practical!