This stylish pen has four functions, as its name states. Switch between a 0.7 mechanical pencil and a 0.7mm ballpoint pen with black, blue, and red ink. If you find yourself constantly switching between different writing utensils, this was designed for you! Editors in particular who may be making revisions and notes on manuscripts or covering stories. The low-viscosity ink has a silk-touch feel, making it extremely writable. An antibacterial agent is used on the rubber grip as well.