Retro 51 Tornado Waikiki Rollerball Pen The Tornado is one of those pens you just can't put down once you start using it. It could be the way Tornado balances perfectly in your hand, or how it writes with a smooth, clean line. Easy, twist-top activator. Retractable rollerball pen (takes Schmidt short capless rollerball refills, Parker ballpoint, or Parker gel refills) Reminiscent of summertime with a lacquered tropical paradise print.