Permanent markers are writing tools with ink resistant to water and erasure, which firmly adhere to a variety of surfaces, including paper, cardboard, plastic, glass, metal, and wood. These markers are used to permanently mark objects, surfaces, and materials in various applications, such as labeling, marking, signing, and writing. They are available in a wide range of colors and tip sizes to meet diverse needs and preferences. Permanent markers are appreciated for their durability and resistance, and they are useful in offices, workshops, schools, and at home for a variety of projects and activities.