The Sharpie Permanent Markers are versatile tools that can be used to mark on a variety of hard-to-mark surfaces. Whether it's plastic, metal, cardboard, vinyl, leather, or glass, these markers are up to the task. With their fine tip, they allow for precise writing even in small areas. The markers come in a convenient 2-pack, making them lightweight and easy to carry around. They are considered the number one choice for permanent markers, thanks to their alcohol-based ink that is both fade and water resistant. No matter the surface, these markers will leave a lasting mark.