This Sharpie 4 pack comes with a blue, gree, red and black twin tip sharpie. The Twin Tip feature allowes you to have a fine point at one end and an ultra fine point on the other end. Sharpie's are permanent on most hard to mark surfaces such as wood, glass, metal, photos, foils, coated paper, and most plastics. These Sharpie's give you a vivid color to maximize attention. How do you use your Sharpie?