A screw drive is a mechanism that converts rotational motion into linear motion, commonly used in various machines and tools. It consists of a screw, which is a cylindrical shaft with a helical ridge, and a nut that fits onto the screw. When the screw is turned, the helical ridge pushes the nut along the length of the screw, creating movement. This type of drive is widely utilized in applications such as automobiles, construction equipment, and furniture assembly. The simplicity and efficiency of the screw drive make it a popular choice for tasks requiring precise control over movement and force.