Amazon.com: Spyderco BaliYo Heavy Duty Butterfly Pen (Orange/Blue) with Replacement Ink Cartridge
The Master - Pen Balisong | Arizona Custom Knives
This is the Spyderco Baliyo. Part pen, part butterfly knife, this bad boy's completely legal but can still deliver the butterfly knife experience. Super fun to fidget with. It's a space pen
Pen Butterfly Knife | Collectors Weekly
Amazon.com : Spyderco BaliYo Twin Handled High Performance Heavy Duty Pen - Orange/Blue - YUS116 : Office Products