NINJA SWORD SOUND EFFECTS PEN
It might not be a Katana but it will get your writing jobs done with a cool SHHINNG sound effect!
Comfortable to write with? Meh... what does that matter?... it's a ninja's pen!
Measures 6 inches long. Plastic. Ball point, medium tip and black ink. Requires 3 LR41 batteries (included). Pen takes D1 refills.