The Pentel EnerGel Deluxe RTX 0.7mm Rollerball Pens are the kinds of pens that make your handwriting look better. For those who still hold true to using a pen and paper or who keep a paper agenda or bullet journal, these pens prove invaluable. Sure to become some of your favorite writing supplies, the pens come in black ink. The Pentel EnerGel RTX pens glide across any type of paper without smudging.