An X-Acto knife is a precision cutting tool commonly used in arts, crafts, and model-making. It features a sharp, replaceable blade that allows for intricate cuts and detailed work on various materials, including paper, cardboard, and plastic. The handle is typically made of metal or plastic, providing a comfortable grip for users. These knives are popular among artists, designers, and hobbyists due to their versatility and accuracy. X-Acto knives come in different blade styles, each designed for specific tasks, making them essential tools for anyone needing fine cutting capabilities.