Pilot Dr. Grip 4+1 0.5mm combines the comfort and quality with its low-viscosity Acro ink, which combines the smoothness of a gel pen with the water resistance and fast drying time of a ballpoint. The ball at the pen tip rotates smoothly, creating a gliding writing experience. The pen's rubber grip is designed to provide a tireless writing experience. This multi-use pen features black, blue, green, and red inks, plus a 0.5 mm mechanical pencil.