Retractable blades are cutting tools designed with a mechanism that allows the blade to extend and retract safely. This feature helps protect the blade when not in use, reducing the risk of accidental cuts or injuries. Commonly found in utility knives and box cutters, retractable blades can be adjusted to different lengths for various tasks. These blades are often made from durable materials like stainless steel, ensuring they remain sharp and effective. The retractable design also makes them convenient for storage and transport, as they can easily fit into pockets or toolboxes without exposing the cutting edge.