River Knife and Tool TPENT Elishewitz Tao Pen Tactical PenProduct ReviewP Click on the link for more reviewsPPrecision titanium designPPointed butt of pen may be used to thrust or provide a disabling pressure pointPPen point may be thrust for penetration in soft tissuePPen made of 6061 aluminum precision machined and hard anodizedPFully functional writing instruments use the Fisher Space Pen ball point cartridge which is pressurized design developed for NASAP