This Self Defense Ink Pen Letter Opener looks like a pen, acts like a pen and writes like a pen, then it must be a pen, right? Yes, but it is also a pen that could actually save your life. They look like an ordinary pen, but feature a 2.13 inch blade that is revealed by pulling the pen apart. This pen is lightweight, easily concealable and discreet. The pen is a fully functional writing ink pen that easily can reveal a blade by pulling it apart if ever needed. Colors include black, silver, gold and red.