SCPEN3BK Schrade Tactical Fountain Pen black is a very useful pen that helps you to defend yourself when attacked by someone. It is a new tactical pen that possesses interchangeable fountain or roller ball writing instrument. The material of pen is CNC Machined 6061 Anodized Aluminum, Black.The Length of this pen is 5.9”. It also features German Hauser Parker Ball Pen Refill (black ink). The pen comprises of interchangeable roller ball black ink cartridge and non-dry roller ball blank ink cartridge. It also includes two fountain refills.