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 ...

A screwdriver comes in handy so often that there's no reason not to keep more than one around the house, like in your kitchen, bathroom, junk drawer, or garage. Ideally, some or all of these would be ...