Art pens, also known as styli, are a type of pen that is used for drawing and sketching. They are usually made of plastic or metal and have a fine tip that allows for precise lines and details. Art pens are often used by artists, illustrators, and designers to create artwork. They are also popular among hobbyists and crafters for creating intricate designs. Art pens come in a variety of colors and sizes, making them a versatile tool for any artist.