CRKT Tao Pen Tactical Pen Black TPENAK Made of the highest quality materials Test for performance and durability Used by service people worldwide Impact crown on the cap can be used to strike Pointed butt of pen may be used to thrust or provide a disabling pressure point Impact crown on the cap can be used to strike Pointed butt of pen may be used to thrust or provide a disabling pressure point Pen point may be thrust for penetration in soft tissue Pen made of 6061 aluminum precision machined and hard anodized Fully functional writing instruments use the Fisher Space Pen ball point cartridge which is pressurized design developed for NASA