A screwdriver is a simple hand tool used to turn screws, which are fasteners that hold things together. It typically has a long, thin metal shaft and a handle for gripping. The end of the screwdriver is shaped to fit into the head of a screw, allowing you to either tighten or loosen it. There are different types of screwdrivers, such as flathead and Phillips, each designed for specific screw shapes. Using a screwdriver is easy and requires just a little practice. To use one, you align the tip with the screw head and turn the handle. This tool is essential for many tasks, from assembling furniture to fixing electronics, making it a must-have in any toolbox.