PILOT Oil-based ballpoint pen Dr. Grip G Spec 0.5 Extra fine Violet

●You can write small letters neatly! 0.5 ultra-fine oil-based ballpoint pen. ●Reduces strain on the neck, shoulders, and arms! Since its release, the Dr. Grip series has established a new field of writing instruments that reduce fatigue. With the cooperation of Professor Yoshida, Department of Design, Faculty of Liberal Arts, Tokai University, we have realized an "easy-to-move writing instrument" based on experimental data, focusing on the "moment of inertia". ●Optimal weight balance! For the first time in a writing instrument, we have focused on the movement of the pen when writing. We have realized a writing instrument that is easy to move by making both ends of the pen lighter and concentrating the weight on the center of gravity, which is the axis of rotation of the writing instrument. By reducing the value of the "moment of inertia" (※) related to the rotational motion of an object, the pen can be controlled with less force, reducing the strain on the hand. (※) It represents the rotational efficiency when an object performs rotational motion. ●0.5mm ultra-fine specification! ●Equipped with low-viscosity oil-based ink "Acro Ink". It is a thick, smooth ink.