Pilot® FriXion Ball Erasable Gel Pen, Stick, Fine 0.7 mm, Assorted Ink and Barrel Colors, 3/Pack

Write smoothly and erase cleanly. Write, erase and re-write until you get it right, without any wear or tear to the paper or messy eraser crumbs. The heat generated by erasing friction turns the unique thermo-sensitive gel ink clear, so your marks simply disappear from the page.