The word "screw" calls to mind the unassuming household connectors, but students will be interested to discover that there are many different kinds of screws, from large augers and mechanical drill presses to the lids of plastic jars! With readable text and an emphasis on practical application, this book explores the many ways that we use screws every day. The text is supplemented with clear, easy-to-understand diagrams, and illustrative photographs, while straightforward experiments involving household items will excite curiosity about this helpful, yet often overlooked, device.