NaitHawk TK9 Tactical Pen - Gun Gray Fixed Blade The bottle tells you when

The bottle tells you when the cartridge needs changing

Accelerated charging to 100% level in 3

lighter than the saber-ground version

When the charge is complete

 keep using comfortably

NaitHawk TK9 Tactical Pen - Gun Gray Fixed Blade The bottle tells you whenTK9 Features and Specification: Build from aircraft grade 6061 T6 aluminum alloy The mil spec Type 3 hardcoat anodized for added surface strength and wear resistance Stainless steel harden tail for window break and self dependence Cushion rubber cap for hand protection when breaking window Made in Germany Schmidt easy flow 9000 cartridge, ultra smooth and easy feel in writing May also be used as a PDA or Smartphones stylus. Sturdy carbon steel pocket