A retractable blade is a type of cutting tool where the blade can be extended or retracted into the handle. This design enhances safety by allowing the user to hide the blade when not in use, reducing the risk of accidental cuts. Common examples include utility knives and box cutters, which are often used in construction and packaging. Retractable blades are typically made from durable materials like stainless steel, ensuring they remain sharp and effective. Many models feature a locking mechanism to secure the blade in place during use, providing added stability and control for various cutting tasks.