Screwing fastens materials using threaded screws for a strong hold. A screw has a helical thread that bites into the material. It is driven with a screwdriver or a power driver. The threads pull the screw into the material and resist being pulled out. A screw holds better than a nail. It is also easier to remove. Screws are used in wood, metal, plastic, and masonry. They come in many types, sizes, and head shapes. The right screw for the job makes the difference.

Screws come in several types. A wood screw has a sharp point and coarse threads. A machine screw has a blunt point and fine threads, used with a nut. A sheet metal screw has a sharp point and fine threads, used to join metal. A drywall screw has a bugle head that sinks into the drywall without tearing the paper. A deck screw has a coating that resists corrosion. A lag screw is a large wood screw with a hex head, used for structural connections. Each type is designed for a specific material and load.

Screwing technique matters. The screw must be driven straight and to the correct depth. A pilot hole may be needed to prevent splitting. The screw must not be overdriven, which strips the threads. The screw must not be underdriven, which leaves the head proud. A power driver with a clutch prevents overdriving. The bit must match the screw head. A worn bit slips and strips the head. Screws are stronger than nails in withdrawal but weaker in shear. That is why screws are used for attaching sheathing and cabinets, and nails are used for framing. The right fastener for the right job. That is the rule.