Pilot FriXion Ball Knock Retractable Erasable EXtra Fine Point Gel Ink Pen - 0.5 Mm - 3 Color set /Value set Which Attached the Eraser Only for Friction Combines the convenience of a retractable with the incredible FriXion erasable gel ink Erase and rewrite repeatedly without damaging documents - Eraser is at the top of the pen, tip is retractable by pressing clip down Unique Thermo-Sensitive gel ink formula disappears with erasing friction The eraser only for friction was attached the sake [ when you would like to erase broadly ]. Colors/Black/Red/Blue/