Fisher Space with Clip Bullet Ballpoint Pen - NASA Matte Black Pen Refills & Inks The thread at the end

The thread at the end of the shaft makes the cap’s edges end with the barrel edges

Crafted with meticulous attention to detail

The Red Planet - Mariner 4 & Allan Hills 84001 set caters to both practicality and exploration

or even a planner coil

Refill: Montblanc Rollerball refills

Fisher Space with Clip Bullet Ballpoint Pen - NASA Matte Black Pen Refills & Inks The thread at the endWhen closed, Bullet Space Pens are the perfect size to carry in your wallet, pocket, purse, car glove box, organizer or toolbox. When open it's a full sized, evenly balanced writing instrument. The pen is fitted with the legendary, pressurized ink refill that can perform at any angle, any temperature and even in zero gravity without any hiccups.