SARASA Mark ON Gel Retractable Pens are a great choice for anyone who needs the right tools to get the job done. Water-based pigment ink is acid-free and water-resistant. Smudge-proof ink dries as fast as 5 seconds. Fine point creates precise lines. Spongy, latex-free rubber grip provides a comfortable writing experience. Binder clip easily attaches to your planner or bag.