This is a "MONOGRAPH" mechanical pencil (white) from Tombow Pencil. It features a twist-out "MONO eraser." It employs the "Freno-knock mechanism," which advances the lead by simply shaking the body up and down. It has a "Frelock" function that locks the "Freno-knock" when the clip is pushed up. It has a drafting-spec tip (fixed pipe type) for stable and precise writing. The lead diameter is 0.5mm. *The eraser has been used slightly. #MONO #DigitalMechanicalPencil #ONOFFLockFunction #White Thank you for viewing.