They hold together everything from the most delicate watch to the largest bridge. The world is literally kept from coming apart by screws and bolts, and yet we don’t often give a thought to these ...

Screws may be commonplace, but that doesn't mean they're simple. A screw is any shaft with a corkscrew groove carved around its surface and, regardless of their design, screws are usually used to ...

There are many relatively simple ways to add horsepower to your car's engine, such as installing a better intake, reprogramming the Electronic Control Unit, or swapping in a freer-flowing exhaust ...

Extrusion is a process used for creating a product (an extrudate) by forcing a material through a die or an orifice to form a shape, or alternatively an extruder is used to produce semi-finished or ...

Gear-obsessed editors choose every product we review. We may earn commission if you buy from a link. Why Trust Us? Screwdrivers are among the simplest hand tools and everybody knows how to use one.