screw

media type="youtube" key="zBjlSJf4274?fs=1" height="385" width="480" a screw can be used for many purposes. Many of these purposes are for construction, because the screw is used mostly to hold things together, mostly planks of wood. However, screws can be used to connect any two objects, and can also be used as cup hooks and screw eyes. Can you find any other uses for the screw?
 * The concept of the screw is used in jars to screw on the cap.
 * Examples of screws
 * Door Lock
 * Drill
 * Meat Grinder
 * Submarine Hatch
 * Jar Lid
 * Floor Screw
 * Smoothie machine