A device operated by hand, employing physical mechanisms like lead screws and gears, creates threads on cylindrical materials. This process shapes the material to accept fasteners like bolts and screws. A common example is a hand-operated die and tap set used for creating threads in metalwork or plumbing applications.
Such devices offer precise control over the threading process, especially valuable for small-scale operations or situations lacking access to power. Historically, these tools were essential for manufacturing and repair across various industries, laying the foundation for modern threading technologies. Their affordability and portability continue to make them relevant for hobbyists and professionals in specific fields.