Pilot® 0.5 MM Assorted Colors Extra Fine Frixion Clicker Erasable Gel Pen Writes Smoothly And Erase Cleanly Without Smudges Or Marks. Both The Eraser And The Tip Retract Easily, Protecting Them As Well As The Bags, Purses And Pockets Used To Carry Them. Enjoy The Quality You Expect From Pilot Pens. Thermo-Sensitive Ink Allows You To Write And Erase Repeatedly Without Damaging Or Tearing Your Documents.