A ratchet strap is a tool used to securely fasten, tie down, or hold objects in place, especially during transportation. It consists of a strong strap, usually made of polyester, and a ratchet mechanism that allows for precise tension adjustment. By operating the ratchet, the strap is tightened around the objects, ensuring they are firmly secured and minimizing the risk of movement or shifting. This type of strap is widely used in trucks, trailers, and other cargo vehicles, as well as in industrial applications.