The Bullet Pen has a long and successful history. It was doing well even before the Space Pen came along - a handy little pocket pen, designed all the way back in 1948. The addition of the super-reliable Space Pen refill made this convenient pen even better, by letting it write at any angle, and on damp, dusty or greasy paper, and in more extreme temperatures - the perfect pocket pen to go everywhere with you, always ready when you need to make a note.