Ideal for art, crafting, home and office, these markers work well on paper, wood, ceramic, metal or plastic. The alcohol-based ink is water-resistant and permanent. They are durable and provide bold, long-lasting color, great for everyday use or for art projects. The fine tip markers feature a fine felt nib ideal for fine lines and writing; the extra-fine tip features a .7mm felt nib for extra fine details. The 2-piece sets include two fine tip markers.