Half size version of the innovative millimeter eraser. Comes in a set with one black and one white eraser, both in half sizes. Developed in collaboration with designer Yuji Baba. The eraser has 5 different erasing widths, and aims to erase one line at a time by aligning the lines in the notebook to the lines on the eraser itself. This saves you the hassle of re-writing when words on the upper or lower lines accidentally get erased, as happens with standard erasers. Made in Japan. Eraser Numbered Edges Correspond To Width Of Notebook Line Erase Single Line At A Time For Pencil