With Kokuyo's Mark+ Two Tone highlighter, you can highlight with two colors easily. The tip of the highlighter separates into two tips in two colors-gray and green. Rotate the highlighter in your grip as you are holding it in hand to switch between the two colors to highlight easily while reading and studying. You can use the different shades to distinguish important highlights from the rest, or you can use them to color-code your notes while keeping them neat and harmonious.