Screws are made by a template with a tooth pattern (rubbing plate) strong close to the tight pressure and make it rotate. Make its surface in the mold to form the teeth. This method is commonly known as the tooth pattern transfer method. The production of screws need to be divided into two parts of production: playing the head type and rolling thread.

Screws are tools that use the physics and mathematics of the circular rotation of an object's beveled surface and friction to progressively fasten artifacts. Screw is a generic term for fasteners, an everyday verbal term. Screws for daily life in the indispensable industrial necessities: such as cameras, eyeglasses, clocks, watches, electronics, etc., the use of very small screws; television, electrical products, musical instruments, furniture, etc., the general screws; as for engineering, construction, bridges, then the use of large screws, nuts; transportation appliances, airplanes, trolley buses, automobiles, etc., is the size of the screws and use.