Rollerball pens utilize the mechanism of ballpoint pens with an ease and consistency similar to fountain pens. They employ a liquid ink reservoir filled with gel or water based ink. This ink is transferred to paper via a small ball in the pen's tip which rolls across a page as you write. Rollerball pens deliver a smooth, high quality writing experience, with a steady flow that requires little pressure to produce. Writing with a rollerball pen creates a clean and clear style sure to leave an impression.